Generic Digital Equity Model in Education: Mobile-Assisted Personalized Learning (MAPL) through e-Modules

: This study addresses the challenges most learners face in Third World and developing countries concerning education accessibility in an emergency. On the basis of the shortcomings found in a review of past studies, this scoping review introduces adapted model mobile-assisted personalized learning (MAPL), which focused on full distance learning using the personalized learning (PL) concept. This concept is rarely used in the classrooms of Third World and developing countries. MAPL is technology-integrated and customized PL but it does not depend on artiﬁcial intelligence. This model bridges the digital divide that hinders learners in accessing education by providing ﬂexibility, regardless of weak internet reception or low bandwidth, among other hindrances, in Third World or developing countries. Learners in these countries inevitably opt for mobile devices as their preferred learning tool. MAPL is necessary and can aid underprivileged learners who are highly dependent on mobile devices. Rethinking and reforming current teaching practices are required. In this study, a pool of 60 articles from 2011 to 2021 was qualitatively synthesized. Among the articles, 29 focused on PL, 15 on mobile learning, and 16 on the potentials of MAPL. The ﬁndings indicate that MAPL could be a viable solution for achieving equity in education for every learner during full-ﬂedged distance learning. components: learner, device, and social aspects. the aspects of teachers when planning knowledge input for


Introduction
The unprecedented COVID-19 pandemic has led to the abrupt closure of schools in many countries. With the "new normal", the learning mode for learners has transitioned from physical learning to virtual learning. Whether digitally literate or not, teachers have had to adopt and adapt to new teaching circumstances via a virtual and distant environment, the result of which has been a drastic increase in the use of the Internet and electronic equipment. In some countries, the transition may be the first experience people have had of conducting school lessons entirely online. Traditional classrooms no longer fit into this "new normal". However, looking on the bright side, it could be a positive transition. Hanover [1] and Izmeztiev [2] oppose the idea of physical classroom learning because of the unfriendly and stiff nature of traditional instructional approaches. They assert that learners become demotivated, which leads to their unsatisfactory academic performance. Furthermore, traditional educational systems tend to provide a "one-size-fitsall" instructional model and cannot adjust to the different backgrounds, abilities, or interests of learners. Thus, if a thoughtful learner-centered instructional method is considered, the mode shift to online learning may be a blessing in disguise. In this regard, Reyna [3] has found online learner-centered approaches effective in shifting the learning experiences of medical students and promoting their self-discipline during the pandemic.
Nevertheless, traditional classroom learning has undeniably irreplaceable benefits, as addressed by Tran [4]. Face-to-face interaction among learners and teachers, which allows discussion and feedback in many ways, is unlikely to happen in an online classroom viewing. Educational lessons accessible through mobile phones are facilitated through social media platforms (e.g., Facebook and YouTube), web service platforms (i.e., WhatsApp, Skype, and Zoom), SMS, and online learning platforms (e.g., Google Classroom, Google Suite, Office 365, and the digital library).
Among the Asian countries, Japan conducted full ICT-based distance learning. In China, besides television broadcasting, mobile learning and massive open online courses were used as alternatives to teaching. Meanwhile, Cambodia is highly dependent on social media and mobile phones for online learning. India and Indonesia focused on offline and online approaches through television broadcasting and online learning platforms [7]. In Malaysia, the Ministry of Education (MOE) offered educational TV programs that collaborated with TV Okey RTM and the Astro broadcasting companies. DidikTV KPM and Slot TV Pendidikan were also established to air from 2-15 h of educational programs each day. Furthermore, a device pilot project known as the CERDIK initiative aimed to provide 150,000 free laptops and Internet service units to assist the underprivileged bottom 40% (B40). However, the number of units was still insufficient because approximately 333,000 learners did not own a suitable device for online education, according to a survey done by the MOE [9].
Therefore, most developing countries still face obstacles in providing equal education for learners. Despite the concerted efforts made by developing countries to assist incapable learners, some learners still cannot achieve the various forms of effective and maximal learning experiences because of the lack of suitable devices and Internet access. Some families share one laptop, which may make it difficult for learners to learn conveniently. Thus, teachers should consider utilizing the mobile device as a learning and teaching tool because it is more affordable. Thus, this study seeks to achieve an equal online education opportunity in developing countries for learners who use mobile devices as learning tools. In conjunction with the core ideas of Education 4.0, this study introduces an appropriate PL approach utilizing mobile devices to ensure an effective and engaging online learning experience for learners.

Study Review Design
This study employed the scoping review as the study methodology. It was based on the six-stage methodological framework outlined by Arksey and O'Malley [12], with consideration given to the scoping framework suggested by Levac et al. [13]. The procedure is given in Figure 1. The scoping review is a method of research synthesis in which the literature of specific topics or research areas are connected to distinguish significant concepts, knowledge gaps, research agendas, decision-making inferences, evidence types, and sources to acknowledge the practice, policymaking, and research involved [14,15].
According to Tricco et al. [16], a scoping review presents a broad overview of the literature evidence about a topic, regardless of the study quality. It is beneficial for scholars who want to study a newly introduced topic. In short, the scoping review reveals a process for generating hypotheses. In this study, the scoping review fits the purpose of discovering a newly adapted teaching and learning model: mobile-assisted personalized learning (MAPL) through e-modules to provide marginalized learners equal and quality distance learning opportunities. Given that this model has yet to be extensively reviewed, the scoping review's exploratory nature enables flexibility when adopting, analyzing, and reviewing any appropriate literature resourced on the focused topic or research area. Subsequently, the evidence collected can be mapped to reveal the potential of the proposed approach.  [9], and Levac, Colquhoun, and O'Brien [13].
According to Tricco et al. [16], a scoping review presents a broad overview of the literature evidence about a topic, regardless of the study quality. It is beneficial for scholars who want to study a newly introduced topic. In short, the scoping review reveals a process for generating hypotheses. In this study, the scoping review fits the purpose of discovering a newly adapted teaching and learning model: mobile-assisted personalized learning (MAPL) through e-modules to provide marginalized learners equal and quality distance learning opportunities. Given that this model has yet to be extensively reviewed, the scoping review's exploratory nature enables flexibility when adopting, analyzing, and reviewing any appropriate literature resourced on the focused topic or research area. Subsequently, the evidence collected can be mapped to reveal the potential of the proposed approach.  [9], and Levac, Colquhoun, and O'Brien [13].
In contrast to the scoping review, the systematic review examines questions specifically based on the selected criteria and tests the hypotheses, which is not practical for a newly developed idea [16]. Therefore, the scoping review methodology was chosen to distinguish all papers relevant to MAPL, regardless of their perceived strength, quality, and study design. The present study, as a result, may impart deep insight and exploration into how PL can take place with mobile technology, and yields a strong foundation for the digital equity of learners in online education.

Scoping Review Research Questions
Setting up research questions is significant for the analysis of the selected topics. The alternatives for solving these questions are described in Figure 2 in order to elucidate the core concerns of the study, which are as follows: a.
What are the PL key elements and results? b.
What are the mobile learning key elements and results? c.
How can MAPL achieve digital equity?

Scoping Review Research Questions
Setting up research questions is significant for the analysis of the selected topics. The alternatives for solving these questions are described in Figure 2 in order to elucidate the core concerns of the study, which are as follows: a.
What are the PL key elements and results? b.
What are the mobile learning key elements and results? c.
The initial guiding questions are listed in Questions (a) and (b). Question (a) aims to investigate the key elements and past studies on personalized and mobile learning. A series of literature that utilized mobile learning and PL was scrutinized in order to answer Question (c). Finally, the study proposes a suitable approach to operationalize MAPL for achieving digital equity. A quality and fair online learning opportunity is yet to be widely introduced among learners in developing countries. This study attempts to reveal a flexible, cost-saving, and Internet-saving learning approach to realizing the engagement of students in distance learning.

Study Selection: Inclusion and Exclusion Criteria
According to Peters et al. [18], evidence screening has two levels. First, on the basis The initial guiding questions are listed in Questions (a) and (b). Question (a) aims to investigate the key elements and past studies on personalized and mobile learning. A series of literature that utilized mobile learning and PL was scrutinized in order to answer Question (c). Finally, the study proposes a suitable approach to operationalize MAPL for achieving digital equity. A quality and fair online learning opportunity is yet to be widely introduced among learners in developing countries. This study attempts to reveal a flexible, cost-saving, and Internet-saving learning approach to realizing the engagement of students in distance learning.

Study Selection: Inclusion and Exclusion Criteria
According to Peters et al. [18], evidence screening has two levels. First, on the basis of the titles and abstracts, the collected articles were screened to ensure their relevance to the main topic of the study. A total of 59 records were excluded, as displayed in Figure 2. Second, the whole texts for 68 articles were assessed for their eligibility. The inclusion criteria included articles that were published between 2011 and 2021. Other inclusion criteria included relevant organizational reports and findings, theoretical articles, such as literature reviews and recommendations based on cited research, and empirical articles, such as authentic qualitative or quantitative studies. The exclusion criteria were that the screening articles did not directly or indirectly relate to the elements, treatments, and methodologies contributing to MAPL. In sum, an article was removed from the literature review list if the following exclusion criteria were met: (1) The article was not published between 2011 and 2021; (2) The article did not describe personalized mobile learning elements, methodologies, or treatments; and (3) The article did not provide relevant key information, future recommendations, or approach implications. Out of 127 articles found, 60 were included in the analysis.

Data Sources and Search Strategy
From 127 sources, 60 articles on personalized and mobile learning were carefully chosen. These articles were used to identify keys, strategies, and solutions for reducing the digital divide in education through a viable distance learning model. Keyword searches were conducted on relevant electronic databases, such as Google Scholar, ResearchGate, and Springer Open. Other sources retrieved online were reference lists and hand-searched key journals, such as The Journal of Research on Technology in Education, which provided deep insight into MAPL. The selection of articles focused on the latest ones between 2011 and 2015. The search terms used for this review included "PL + mobile learning", and "PL + mobile-assisted learning".

Findings and Discussion
A total of 60 articles were finally retrieved from electronic databases and reference lists, and by hand-searching key journals. These papers discussed the key elements, various instruments, methodologies, and strategies for implementing MAPL. They were published in various countries from 2011-2021. Figure 3 portrays the publication trend. criteria included relevant organizational reports and findings, theoretical articles, such as literature reviews and recommendations based on cited research, and empirical articles, such as authentic qualitative or quantitative studies. The exclusion criteria were that the screening articles did not directly or indirectly relate to the elements, treatments, and methodologies contributing to MAPL. In sum, an article was removed from the literature review list if the following exclusion criteria were met: (1) The article was not published between 2011 and 2021; (2) The article did not describe personalized mobile learning elements, methodologies, or treatments; and (3) The article did not provide relevant key information, future recommendations, or approach implications. Out of 127 articles found, 60 were included in the analysis.

Data Sources and Search Strategy
From 127 sources, 60 articles on personalized and mobile learning were carefully chosen. These articles were used to identify keys, strategies, and solutions for reducing the digital divide in education through a viable distance learning model. Keyword searches were conducted on relevant electronic databases, such as Google Scholar, Re-searchGate, and Springer Open. Other sources retrieved online were reference lists and hand-searched key journals, such as The Journal of Research on Technology in Education, which provided deep insight into MAPL. The selection of articles focused on the latest ones between 2011 and 2015. The search terms used for this review included "PL + mobile learning", and "PL + mobile-assisted learning".

Findings and Discussion
A total of 60 articles were finally retrieved from electronic databases and reference lists, and by hand-searching key journals. These papers discussed the key elements, various instruments, methodologies, and strategies for implementing MAPL. They were published in various countries from 2011-2021. Figure 3 portrays the publication trend.

PL
The concept of PL made its first prominent appearance in the early 20th century when philosophers of education, John Dewey, William Kilpatrick, and others, advocated learner-centered learning [19,20]. Dewey's philosophy guided educators to consider the

PL
The concept of PL made its first prominent appearance in the early 20th century when philosophers of education, John Dewey, William Kilpatrick, and others, advocated learnercentered learning [19,20]. Dewey's philosophy guided educators to consider the interests, needs, and passions of learners in curriculum planning, and granted the learners choice and voice during the learning process [21,22]. As the years passed, different PL methods have been sought that consider the diversity of learners. In 1968, Fred Keller constructed a well-known learner-centered instructional model, known as the personalized instruction system. Acting as one of the PL forerunners, this mastery-oriented model allowed learners to learn independently at their own pace [23]. Even though the PL concept has long been known in education, it has only recently evolved into many forms, and learners can benefit from PL the most from online learning [24].
In contrast to curriculum-centered PL, the 21st-century PL is learner-centered and provides constructivist teaching practices and instructional strategies that allow for the individualization and differentiation of learners. It is a specific learning model that utilizes technology to customize instructions, and that pays attention to learners with different ability levels, needs, and interests [25][26][27][28]. From the perspectives of Hanover Research [1], the modern PL has some additional features to the above-mentioned characteristics. First, it emphasizes 21st-century teaching and learning skills. Learners can direct "how, what, when, and where" they learn, and it is connected with utilizing progressive technology. Furthermore, technology provides educators with the flexibility to adapt to learners' needs quickly and provide real-time access to customized content and resources [24]. In other words, learners take ownership of their learning.
For instance, technology-integrated PL can be conducted through adaptive learning, blended learning, cognitive analytics, cognitive learning systems, cognitive tutors, competency-based education, digital playlists, educational data mining, intelligent tutoring systems, learning analytics, learning management systems, learning progressions, and personalized learning plans [19,25]. In China, the Squirrel AI online learning system adopts adaptive learning technology to widely support the PL of K-12 school learners [29].
To prevent confusion, Hanover Research [1] clarified differences in personalization, individualization, and differentiation instructions, as shown below in Figure 4. In short, personalization is a mix of individualization and differentiation.
According to Abd Halim et al. [30], the rise of e-learning is insufficient for a conducive online learning environment because it still lacks personalization. Thus, the personalized learning environment (PLE) concept became infamous for its composed, organized, and packaged learning content. Teachers no longer control learners' learning. Hanover Research [1] stresses that an environment or culture that supports PL should be cultivated to carry out a successful PLE. In an ideal PLE, learners will feel motivated and interested in engaging in learning [31]. Moreover, it is also conducive to self-directed learning; teachers and learners collaborate to plan meaningful learning activities. In the meantime, teachers scaffold students' learning based on their previous knowledge, interests, and skill levels in order to nurture a constructivist environment. Lastly, tools, such as reflection, seminars, and long-term projects would be utilized by teachers to increase the initiative, cognitive skills, reflective skills, and problem-solving skills of students in learning specific knowledge. Teachers should always view the PLE as a crucial element in conducting a PL lesson. systems, learning analytics, learning management systems, learning progressions, and personalized learning plans [19,25]. In China, the Squirrel AI online learning system adopts adaptive learning technology to widely support the PL of K-12 school learners [29].
To prevent confusion, Hanover Research [1] clarified differences in personalization, individualization, and differentiation instructions, as shown below in Figure 4. In short, personalization is a mix of individualization and differentiation.  For a successful PL implementation, Johns and Wolking [32] recommend four elements. The first element is a flexible content tool that encourages differentiated paths, paces, and performance tasks. It is highly customizable and has integrated digital content instruction. It lets learners know the reason for utilizing the selected digital tool. The second element is targeted instruction. Personalized instruction should be in sync with the needs and learning goals of learners. Furthermore, flexibility in grouping learners according to their needs is needed to convey targeted instruction. The third element is the reflection and ownership of learners, where learners are given the opportunities to make ongoing reflection, promoting the ownership of their own learning [33]. Lastly, a successful PL should have data-driven decisions. The data collected often influence the instructions and grouping. Benson in Patrick, Kennedy, and Powell [27] proposed four necessary elements for a PL model: learner profiles (skills, gaps, strengths, weaknesses, interests, and aspirations); personal learning paths (goals and objectives); individual mastery (continuous assessment according to performed mastery); and a flexible learning environment. In order to extract and combine the indicated elements of a well-prepared PL lesson, learners would have their profiles set up or initially ready. During a PL lesson, from the data collected by teachers, learners are individually given instructions, as well as flexible content and tools, and they learn via a flexible environment. In each lesson, learners are aware of their learning paths and can reflect on them from time to time. Finally, they will be assessed according to their learning paths at the end of each lesson. This cycle repeats for the next goals and objectives [27].
Successful PL can improve one's metacognitive, social, and emotional competencies [34]. DeMink-Carthew et al. [35] stress the significance of PL in strengthening the social and emotional learning and self-awareness of learners in terms of acknowledgment, metacognition, and reflection on their weaknesses, strengths, and behaviors. Learners should be given the right to make meaningful decisions, support and reflect on their strengths, connect their feelings with learning experiences, and obtain the results. Furthermore, Gerasimova and Schevlyagin [36] support earlier claims that the following social and emotional skills (SES) can be promoted: perseverance and grit, emotional regulation, selfefficacy, collaboration, metacognition, and self-regulation. Furthermore, Alamri et al. [37] Sustainability 2021, 13, 11115 9 of 21 proved PL effectiveness in providing learners with self-determination and intrinsic motivation in online higher education.
Olofson et al. [38] reported a broad implementation of PL in American middle schools. A survey was performed on 232 middle-grade teachers who were involved in PL. By 2017, the teachers started utilizing PL in a class or a large group of learners, personalized assessment, out-of-school learning, as well as the technology context. Walkington and Bernacki [39] provide insight into PL implementation in various academic subjects in a physical classroom setting. Despite the different forms of PL being taken, they argue that an ideal PL practice has PL practitioners who: (1) are clear about the PL approach and theory that are aligned to the characteristics of learners and their learning environment; (2) maintain researcher-teacher-leader connections for design-based PL research; (3) frequently gather observational data for the effectiveness of PL approaches; and (4) conduct research on boosting the control, choice, and ownership of learners during PL.
Targeting the K-12 high and low academic performance learners in the United States, Lee et al. [40] studied how teachers dealt with both categories of learners differently. While conducting PL in a classroom with high-performing learners, the teachers tend to conduct more detailed and technology-based PL. They consider the career goals of learners while planning PL, share project learning outcomes, evaluate nonacademic outcomes, and forge a deep relationship with more learners. Despite the implementation differences, PL practice and technology integration benefited the academic performance of learners [40][41][42][43]. Focusing on K-12 learners, Tsybulsky [44] tested the impacts of digital curation and the utilization of digital tools in choosing, preserving, collecting, arranging, classifying, and sharing digital assets on a PL science subject through a phenomenological qualitative approach. The outcome indicates the potential for digital curation in PL and the improvement of cognitive and emotional learning experiences.
In an American high school, teacher-created modules were used to implement blended PL lessons [25]. These modules shared learning content and allowed teachers to extract data in order to detect weak learners and categorize learners based on their ability. Furthermore, assessment could also be done from time to time to provide prompt feedback and carry out mastery-based grading practices. Following PL criteria, these modules contained personalized objectives, content, activities, and assessments. Learners were fully informed of their learning progress throughout the learning event. Illuminate or Canvas applications were used by the teacher to discipline and monitor learners.
Alamri et al. [45] conducted an integrative literature review in higher education and identified three technology models that supported PL: digital badges, adaptive learning technology, and competency-based technology. Digital badges use a learner dashboard as the main feature, whereas the latter two adopted algorithm-based tutoring systems. They were proven advantageous when used in traditional learning environments, and effective in increasing the learning engagement of students.
Given the outbreak of COVID-19, Major and Francis [46] performed a rapid evidence review on the application of technology-supported PL in low-and middle-income countries (LMICs) to relieve mass school shutdown complications. Technology-supported PL showed great potential when applied among school-age learners during the current pandemic in LMICs. Although learners kept on learning outside classrooms and schools, the features of PL could still ensure positive learning outcomes and were believed to decrease the educational gaps for marginalized learners.
The literature has shown that PL can produce better academic performances from learners because of its nature in meeting the learning needs and interests of every learner. Learner-centered learning has become a demanding trend in Education 4.0. Furthermore, PL efficacy in fostering SES is undeniably essential and should not be neglected. It is also perceived as a tool to achieve educational equity [36]. Most importantly, it can reveal significant differences among the school learners of LMICs. Despite these features, testing of the integration of the teacher-created module strategy into a fully online format is necessary. Nevertheless, it may be suitable for teachers in developing countries to start their PL practice because they are familiar with creating modules. The key elements of PL found in earlier studies can significantly contribute to PL teaching ideas. The extra abilities teachers need to acquire for distance learning will be the skills necessary to teach online and their understanding of PL. Instead of depending on the learning platform that charges learners, zero-rated or low-cost learner-friendly alternatives and digital resources can be sought out to maximize the PL experience of learners. This is aligned with the idea of providing a quality education in which the needs and interests of every underprivileged learner can be met, regardless of the circumstances. Figure 6 summarizes the key concepts of PL.

Mobile Learning
Concerning technology-mediated learning theory [47], mobile learning, also known as "M-Learning", is defined as the online, distance, or modern learning method using portable or wireless computing devices, such as handheld and tablet computers, MP3 players, smartphones, and mobile phones [6,[48][49][50][51]. The invention of various program applications and social networking sites or software has meant that m-learning has undergone considerable leaps of advancement [50].
In Malaysia, Ariffin [52] conducted a qualitative study among local university learners to inspect their learning on self-generated mobile learning activities and found that they had a better understanding of the subjects they studied online. Masrom et al. [53], and Abdul Latef et al. [54], also discovered positive attitudes and a readiness toward m-learning among Malaysian teachers, lecturers, and learners.
M-learning for language, known as mobile-assisted language learning (MALL), is a strategy widely used in foreign language education and has lasted at least a decade [55]. Cakmak [55] cited Chen and Hsu's stand on the potential of MALL in producing positive language learning outcomes. According to his findings, the previous MALL research has been based on two approaches. First, content-based MALL studies concentrate on designing language learning materials and activities. Second, the design and learner need to improve the participation and motivation of learners in learning L2. These studies have proven the effectiveness of MALL in L2 learning. Concerning Education 4.0, Bonfield et al. [56] discovered notable positive changes in mobile learning courses among UK and international higher education providers by providing bite-sized modules that can be accessed whenever and wherever the learners wanted. For successful mobile learning, Baker et al. [57] stress that the lessons carried out should be purposeful, meaningful, and effective.
Nevertheless, Balaji et al. [48], and Qoussini et al. [58], highlight some of the potential disadvantages of mobile learning, such as: the limited screen size, short battery life, insufficient memory capacity, difficulty in printing, inconvenient use of moving graphics, and more

Mobile Learning
Concerning technology-mediated learning theory [47], mobile learning, also known as "M-Learning", is defined as the online, distance, or modern learning method using portable or wireless computing devices, such as handheld and tablet computers, MP3 players, smartphones, and mobile phones [6,[48][49][50][51]. The invention of various program applications and social networking sites or software has meant that m-learning has undergone considerable leaps of advancement [50].
In Malaysia, Ariffin [52] conducted a qualitative study among local university learners to inspect their learning on self-generated mobile learning activities and found that they had a better understanding of the subjects they studied online. Masrom et al. [53], and Abdul Latef et al. [54], also discovered positive attitudes and a readiness toward m-learning among Malaysian teachers, lecturers, and learners.
M-learning for language, known as mobile-assisted language learning (MALL), is a strategy widely used in foreign language education and has lasted at least a decade [55]. Cakmak [55] cited Chen and Hsu's stand on the potential of MALL in producing positive language learning outcomes. According to his findings, the previous MALL research has been based on two approaches. First, content-based MALL studies concentrate on designing language learning materials and activities. Second, the design and learner need to improve the participation and motivation of learners in learning L2. These studies have proven the effectiveness of MALL in L2 learning. Concerning Education 4.0, Bonfield et al. [56] discovered notable positive changes in mobile learning courses among UK and international higher education providers by providing bite-sized modules that can be accessed whenever and wherever the learners wanted. For successful mobile learning, Baker et al. [57] stress that the lessons carried out should be purposeful, meaningful, and effective.
Nevertheless, Balaji et al. [48], and Qoussini et al. [58], highlight some of the potential disadvantages of mobile learning, such as: the limited screen size, short battery life, insufficient memory capacity, difficulty in printing, inconvenient use of moving graphics, and more distractions. Cakmak [55] states the need to reflect on the limited screen size problem and improve oral communication and collaboration among learners. Despite the above-mentioned m-learning challenges, some of these limitations can be mitigated or prevented with rapid technological advancements. Teachers should first examine the advantages and disadvantages of their teaching methods and see if they suit the features and characteristics of mobile-based learning in order to overcome other existing problems.
The International Baccalaureate Organization [6] has designed a 4C framework to indicate the decent implementation of mobile learning. Moreover, it could broaden the experiences of learners who do not own laptops at home or lack convenient access to high bandwidth. The 4Cs are as follows: (i) Content: learning is supported with media, such as documents, audio, or video. (ii) Computer: data are collected from the learner and are processed. (iii) Capture: data are collected from sensors (camera and GPS) and are saved for sharing or reflection. (iv) Communicate: learners are interconnected.
This framework can be advantageous in assisting underprivileged learners in developing countries with distance learning.
With the advent of mobile phones, a huge potential was created for a more progressive educational paradigm. A significant amount of earlier literature has proven the success of mobile technologies in reaching learners and providing them with more possibilities in terms of learning forms, tools, and resources. Mehdipour and Zerehkafi [49] expressed an increasing need for m-learning in developing countries for mobility, accessibility, and affordability. Furthermore, Bachore [59] reports portability and connectivity as the two main advantages of mobile devices. Thus, the mobile device is a suitable alternative for underprivileged learners for online learning at equitable levels. The digital gap can be reduced when more online learning opportunities are available. Figure 7 sums up the key concepts of mobile learning. distractions. Cakmak [55] states the need to reflect on the limited screen size problem improve oral communication and collaboration among learners. Despite above-mentioned m-learning challenges, some of these limitations can be mitigated or vented with rapid technological advancements. Teachers should first examine the vantages and disadvantages of their teaching methods and see if they suit the features characteristics of mobile-based learning in order to overcome other existing problems.
The International Baccalaureate Organization [6] has designed a 4C framework to cate the decent implementation of mobile learning. Moreover, it could broaden the ex ences of learners who do not own laptops at home or lack convenient access to high b width. The 4Cs are as follows: i) Content: learning is supported with media, such as documents, audio, or video. ii) Computer: data are collected from the learner and are processed. iii) Capture: data are collected from sensors (camera and GPS) and are saved for sharin reflection. iv) Communicate: learners are interconnected.
This framework can be advantageous in assisting underprivileged learners in dev ing countries with distance learning.
With the advent of mobile phones, a huge potential was created for a more progre educational paradigm. A significant amount of earlier literature has proven the succe mobile technologies in reaching learners and providing them with more possibilities in t of learning forms, tools, and resources. Mehdipour and Zerehkafi [49] expressed an inc ing need for m-learning in developing countries for mobility, accessibility, and affordab Furthermore, Bachore [59] reports portability and connectivity as the two main advantag mobile devices. Thus, the mobile device is a suitable alternative for underprivileged lea for online learning at equitable levels. The digital gap can be reduced when more o learning opportunities are available. Figure 6 sums up the key concepts of mobile learnin

Potentials of MAPL
Mobile learning has amplified the possibilities of personalization in learning. Cisco [60] asserts that a personalized environment and context must be prepared, and learners should be asked some questions in order to achieve personalization through mobile learning. Next, learners give personalized responses using their mobile devices anytime and anywhere. These features may be videos, audio, texts, collaborations, and other modes available. Given the various features available, mobile learning can suit different learning needs and styles, such as those required by visual, auditory, reading/writing, and kinesthetic learners. In addition to accommodating diverse learners, mobile learning is especially helpful in getting learners involved and offers access to expertise and collaboration [60]. However, the employment of mobile technologies in PL should ensure that they are highly portable, individual, unobtrusive, available, adaptable, persistent, useful, and user-friendly [49].
According to Mehdipour and Zerehkafi [46], and Radhakrishnan [61], m-learning has many benefits that make it a suitable option for PL. These advantages are: relatively inexpensive opportunities; multimedia content delivery and creation options; continuous and situated learning support; improved literacy levels, numeracy, and participation in education; and the communication features of mobile phones as part of a larger learning activity. Particularly, m-learning can eliminate communication barriers between learners and their teachers. M-learning works effectively with learner-centered learning. In a sense, it supports distance learning and PL [48,60,62,63]. Furthermore, learners can feel positive about the PL system in mobile learning [64]. Thus, m-learning has potential for PL.
Ally and Tsinakos [65] point out that many learners skip the personal computer stage and head straight to learning via mobile devices. As a result, learning materials that are accessible through mobile devices are in high demand. Qoussini et al. [58] support the use of mobile learning for its capacity to let learners engage in authentic world learning and gain motivation, and learn confidence and autonomy, unrestricted by time and location. Mobile learning is viable individually or collaboratively and it encourages social communications. Most significantly, it is suitable for PL because of its flexibility as learner-centered content and it serves as a tool for assessments and surveys. Reinforcing earlier comments, Traxler [66] states that PL could be achieved successfully when learners focus on their personal goals and have autonomy in selecting media. Whalley et al. [67] assert that mobile devices are ideal in nurturing PLEs that pay attention to the learning needs of learners. Educational quality can be enhanced because of the omnipresence and flexibility of PLEs. Given the status of the COVID-19 pandemic, it is more feasible to venture into decent mobile learning.
While conducting PL, Internet access and digital devices are the required basics [1, 68]. Given that the focus of this study is on the use of mobile devices, some essential points need consideration for distance learning. First, the device's screen size should be big enough to show websites and applications in order to boost participation. Another point is that if learners encounter limited network access, they should be given an option for accessing and downloading the learning content anytime and anywhere. This feature is vital because downloadable content provides the flexibility for learners to resume their learning, regardless of the restrictions faced at a particular time [1].
To conduct mobile learning aligned with the PL concept, Toh et al. [51] introduced the idea of knowledge personalization. Generally, knowledge personalization means that the knowledge offered to learners should be based on their characteristics, abilities, and behaviors. At times, learning through mobile technology may lead to learners undergoing learning individually because of the lack of constant supervision and guidance from teachers. Therefore, learners have to learn ways to monitor and manage their own knowledge-gaining processes [43]. As a result, knowledge personalization in PL is indispensable for providing learners with diverse learning abilities and behaviors with different ways to manage their knowledge. Figure 8 shows the framework of knowledge personalization [51]. It is divided into three categories: context, content, and learner. Similarly, Hashim and Ahmad [69] also developed a mobile school conceptual framework that comprised three main components: learner, device, and social aspects. These should be the focus aspects of teachers when planning knowledge input for learners.
Sustainability 2021, 13, 11115 14 o personalization [51]. It is divided into three categories: context, content, and learn Similarly, Hashim and Ahmad [69] also developed a mobile school conceptual fram work that comprised three main components: learner, device, and social aspects. Th should be the focus aspects of teachers when planning knowledge input for learners. Al-Razgan and Alotaibi [70], and Zhang et al. [31], held an intervention with a p sonalized Android app and observed the prominent positive attitudes of langu learners toward personalized mobile learning systems. Similarly, a comparative stu was conducted by Zou et al. [71] on assisting the personalized vocabulary learning of E learners through task recommendation in e-learning systems. They found a close r tionship between English vocabulary improvement and online PL. Chen and Hsu cited in Cakmak [55]) also consolidated the foundation of personalized MALL in p ducing positive language learning outcomes. Finally, Kukulska-Hulme [72] deeply plored the personalization of language learning through mobile technologies and rei ated that PL was applicable for individual and group learning. Such learning gives p ple social experiences. Generally speaking, MAPL in distance learning has much pot tial. In terms of the academic performance and engagement level, PL and MALL sh promising signs. The integration of these strategies may create a great distance learn opportunity for learners, especially those who cannot enjoy the benefits of all of online learning features. PL is flexible enough for teachers to plan learning content a tools according to the situations and needs of learners.
As the literature reveals, the gaps indicate that most studies related to m-learn have focused more on higher education, perhaps because m-learning is not a learn strategy that is in high demand in primary or secondary schools. These school less usually take place in a physical classroom setting in developing countries. The idea o fully m-learning-implemented and PL-implemented environment is still fresh amo primary and secondary school learners. According to a review study by Xie et al. [ research on personalized or adaptive learning through portable devices is yet to be plored. Thus, researchers should commence research in this field to benefit more learn whose families own mobile devices only. Furthermore, studies on PL implementat with regard to language are limited. More research should be carried out in order to veal the effects of PL in MALL. Moreover, when the scope is narrowed down, onl Al-Razgan and Alotaibi [70], and Zhang et al. [31], held an intervention with a personalized Android app and observed the prominent positive attitudes of language learners toward personalized mobile learning systems. Similarly, a comparative study was conducted by Zou et al. [71] on assisting the personalized vocabulary learning of EFL learners through task recommendation in e-learning systems. They found a close relationship between English vocabulary improvement and online PL. Chen and Hsu (as cited in Cakmak [55]) also consolidated the foundation of personalized MALL in producing positive language learning outcomes. Finally, Kukulska-Hulme [72] deeply explored the personalization of language learning through mobile technologies and reiterated that PL was applicable for individual and group learning. Such learning gives people social experiences. Generally speaking, MAPL in distance learning has much potential. In terms of the academic performance and engagement level, PL and MALL show promising signs. The integration of these strategies may create a great distance learning opportunity for learners, especially those who cannot enjoy the benefits of all of the online learning features. PL is flexible enough for teachers to plan learning content and tools according to the situations and needs of learners.
As the literature reveals, the gaps indicate that most studies related to m-learning have focused more on higher education, perhaps because m-learning is not a learning strategy that is in high demand in primary or secondary schools. These school lessons usually take place in a physical classroom setting in developing countries. The idea of a fully m-learning-implemented and PL-implemented environment is still fresh among primary and secondary school learners. According to a review study by Xie et al. [73], research on personalized or adaptive learning through portable devices is yet to be explored. Thus, researchers should commence research in this field to benefit more learners whose families own mobile devices only. Furthermore, studies on PL implementation with regard to language are limited. More research should be carried out in order to reveal the effects of PL in MALL. Moreover, when the scope is narrowed down, only a short amount of relevant PL research has been conducted in developing countries. Therefore, developing countries need more breakthroughs to keep up with the ideology of Education 4.0. These countries should acknowledge the existence of the digital divide between urban and rural school learners in order to improve the condition. A well-planned MAPL is needed to compensate for the shortcomings among disadvantaged learners. Figure 9 illustrates the potential of MAPL as a whole. short amount of relevant PL research has been conducted in developing countries. Therefore, developing countries need more breakthroughs to keep up with the ideology of Education 4.0. These countries should acknowledge the existence of the digital divide between urban and rural school learners in order to improve the condition. A well-planned MAPL is needed to compensate for the shortcomings among disadvantaged learners. Figure 8 illustrates the potential of MAPL as a whole. Figure 8. Potential of MAPL. Figure 9. Potential of MAPL.

Achieving Digital Equity: MAPL through E-Modules
With the emergence of new teaching approaches, some findings and suggestions from the studies were adopted and adapted to provide a proper and suitable generic digital equity model for underprivileged learners, namely, MAPL through E-Modules, as shown in Figure 10.

Achieving Digital Equity: MAPL through E-Modules
With the emergence of new teaching approaches, some findings and suggestions from the studies were adopted and adapted to provide a proper and suitable generic digital equity model for underprivileged learners, namely, MAPL through E-Modules, as shown in Figure 9. Steps to mobile-assisted personalized learning (MAPL) through e-modules. ** Optional, according to the needs or preferences of teachers. Figure 10. Steps to mobile-assisted personalized learning (MAPL) through e-modules. ** Optional, according to the needs or preferences of teachers.
A flow chart with a detailed step-by-step explanation guides teachers in smoothly carrying out MAPL through the e-modules. The usage of e-modules adapts the idea of bitesized learning that has been proven effective in enhancing m-learning [56]. Meanwhile, the online downloadable learning content of the e-modules allows convenient access anytime and anywhere.
To gain ideas for various instructional approaches, Zayabalaradjane [74] recommends a few suitable behavioral indicators with respective activity examples to determine the online learning engagement of learners: (i) Observational learning behaviors: read emails and discussion posts, watch videos, refer to notes and documents, and maintain constant virtual attendance; (ii) Application learning behaviors: share thoughts on forums, reply to emails, answer online quizzes or tests, share questions, post requests or provide feedback, make clarifications, share own created resources, and make progress in learning.
As a matter of fact, the learners who face complications tend to lose focus and the motivation for engaging in online learning easily. An effective way to increase the participation of learners is to provide appreciation and incentives for their achievement. Some helpful incentives include grades, certificates, rewards, gamified badges, guidance, and self-assessment rubrics. These guidelines can be convenient when teachers wish to motivate the learners and show more appreciation for them while applying the MAPL approach. Moreover, planning pedagogical tools in various forms via social media or online learning platforms is another way to keep learners motivated [75].
The integration of multimodal digital technologies in MAPL lessons, as above, can also effectively engage learning in online classroom settings. As the technology advances over time, the needs of multiliteracies in distance learning classrooms has been increasing [76]. Moreover, fun learning experiences should also be created to decrease the stress of distance learners adapting to emergent learning [77]. In this case, applying gamification features on teaching tools can bring forth the desired expectation [78]. In a study conducted by Azmi et al. [79], the usage of data-driven learning (DDL) in Kibbitzers language modules again proved MAPL that encouraged data-driven decisions in order to be more beneficial for self-paced and self-accessed learning.
Reviewing the past studies, this generic digital equity model, MAPL through E-Modules, which has applied the concept of PL and m-learning, is promising because of its capability in achieving digital equity. M-learning provides a strong foundation because of its affordability, mobility, and flexibility. It is compatible with the PL that focuses on every learner's needs and interests. Hence, a quality and equal education is realizable with the application of MAPL through e-modules.

Conclusions
This study adopted the scoping review as a literature review method. The 60 studies on MAPL reveal some research gaps: (1) the introduction of MAPL in developing countries; (2) the full online primary/secondary school implementation of MAPL; (3) the application of MAPL in language subjects; and (4) the ways to achieve education equality in developing countries through MAPL. Research on bridging these gaps would be helpful for uncovering the potentials of MAPL as a progressive and guiding teaching and learning model. With the world-scale COVID-19 outbreak, these findings may help to overcome the challenges schools face in developing countries in providing quality and equal education to underprivileged learners who do not own a computer or laptop to engage in distance learning. The flexibility of e-modules can efficiently allow learners to access full distance learning across time and space. While learning through mobile devices makes equal distance learning chances more realizable, PL that focuses specifically on the individual needs and interests of learners can ensure equity in education. The four gaps emphasized above may be addressed by researchers in future studies for proper answers. As technology progresses every day, distance learning becomes even more relevant. Everyone should always be prepared to face any possible or unexpected school closures, taking the repercussions of this pandemic as a lesson. Therefore, an exploration of the best distance learning strategies should be a continuous process in order to continue to bring enlightenment to this large-scale education evolution, inspired by Education 4.0.