How Reducing Discomfort Impacts Peer Assessments of Preservice Teachers

: This study examined the effects of a feedback model called Peer Review of Teaching (PRT) on preservice teachers’ learning. In this model, preservice teachers ( n = 81) participated in critical feedback on teaching demonstrations in the absence of presenters. Presented are four themes of the experience of teaching and sharing feedback including how the absence of a peer presenter impacted feedback process. Our ﬁndings suggest that teacher educators create intellectually safe and sensitive learning opportunities with critical feedback for preservice teachers to engage in a professional practice of peer assessments.


Introduction
Notions related to teachers as reflective practitioners have received considerable attention by researchers and teacher educators [1][2][3][4]. A common view of the reflective practitioner is that teachers share effective practice with peers and reflect on the appropriate use of research and feedback [5]. As reflection is considered key to becoming educators, teacher educators ensure that preservice teachers (PSTs) have authentic opportunities to engage in reflection and experience teaching as a scholarly endeavor that involves a cohesive body of theories, research, critical thinking, and evaluation [6][7][8].
Reflection at the level of preservice teachers is an individual and social experience with the potential to result in professional growth. Such opportunities include sharing professional views on teaching and learning, examining teaching practice, and devising action plans for improvement. In particular, constructing lesson plans and enacting curriculums are important aspects of teacher preparation programs. Peer feedback on teaching tasks often play a significant role, as it enables PSTs to engage in evaluating peers' performances and reflect on their own teaching [9][10][11].
The potential benefits of peer feedback on PSTs' teaching are clear: it helps PSTs identify their strengths and areas of growth [12,13], it increases collegiality and helps to shape professional practice [13,14], and more importantly it "helps to clarify some of the ways in which teacher education can model, and influence, the nature of schools as learning communities" [15]. However, more research is necessary to confirm the extent and favorable conditions of critical and constructive peer feedback experiences on PSTs' teaching [16]-i.e., the way peer review of teaching is influenced by personal reflection and interpersonal factors especially when PSTs demonstrated low participation [17][18][19] in peer feedback.
The purpose of this study is to examine the impact of a feedback model in which teacher candidates have the opportunities to offer critical feedback to their peers and reflect on the whole experience of teaching and analyzing the delivery. The research questions that guided the study are:
How does their peer feedback change with their experience of a new feedback model?

Anonymous Feedback
Peer feedback can only be as effective as the authenticity of the process. Anonymous peer feedback refers to a peer review condition in which the reviewers and reviewees are kept unknown to one another. This condition can contribute to an environment where reviewers and reviewees may avoid face-to-face discomfort while sharing detailed discussions of performance and candid evaluations. Research has documented the major advantage of anonymous peer feedback [12,21,23,27,[30][31][32]. Research [19,27] reported that anonymity could increase critical feedback because in anonymous situations, students are relieved from social pressure so they can be more honest and less anxious about expressing their opinions regardless of interpersonal factors. In particular, Connolly, Jessup, and Valacich [31] compared the characteristics of feedback between anonymous groups and non-anonymous groups, and showed that anonymous groups demonstrate more critical thinking than non-anonymous groups. Despite the many benefits of anonymity discussed in the literature, however, research on the impact of anonymous peer feedback on preservice teachers' learning is sparse. Most previous studies focused on the effect of anonymous peer feedback on student learning. As Scheeler, Ruhl, and McAfee [33] pointed out, few studies have focused on the effective feedback of teachers. This study intended to address this gap by developing a feedback model emphasizing anonymity and implementing it with PSTs.

What Effective Feedback Entails
• Drawing on sociocultural theory (which highlights human intentions and possibilities and how they can be developed) and social constructivism (which focuses on how learners are actively engaged in constructing their knowledge), we can assume that teachers guide the learning process and peers are involved through collaboration. When multiple peers and teachers provide feedback, it allows those who provide or receive feedback to have the opportunity to reflect and refine their learning. With respect to specific ways for a system of peer feedback to engage learners in the learning process, the characteristics of effective feedback [28] can be categorized into five clusters (Table 1): (1) overview of feedback characteristics, (2) task-related characteristics, (3) timing, (4) affective and emotional characteristics, and (5) effects on learners. Given that the task-related cluster of elements in Table 1 mirrors the authenticity of feedback, in exploring the efficacy of a feedback model on PSTs' learning we examined the levels of PSTs' engagement in participation.

Formative Feedback
A key aspect of formative feedback is that the learner receives information to improve learning [34,42]. Black and Wiliam [43] articulated the essential elements of formative feedback: clarifying learning goals and criteria for evaluation; implementing learning tasks to produce evidence of student understanding; providing feedback that enables learners to make changes; using peers as instructional resources; and fostering a sense of ownership in learning for students. Further, Hattie and Timperley [44] conceptualized feedback as information on performance or understanding, involving possible agents such as teacher, peer, self, parent, book, and experience. Over time, the field has begun to examine the relationships between effective feedback and outcomes, looking at how characteristics of agents, different types of knowledge, and feedback types can together create different interactions and influence feedback models [44,45].
Peer feedback models in teacher education settings are connected to various feedback models (e.g., [44]) proposed in the field of formative feedback. In particular, peer review of teaching (PRT) involves agents such as peers with the common professional aspiration, teacher knowledge through performance, and a critical discourse through which peers share constructive feedback on teaching performance [46,47]. The present study implements a PRT practice in a university-based teacher education program and examined the relationship between affective components of feedback and level of engagement in the collaborative model of PRT [12,13]. We aimed to illustrate how preservice teachers process information about content, understand the performance of teaching tasks, and foster a sense of trust through participating in the professional practice of feedback sharing.

Research Design
The study used both qualitative data (e.g., survey comments and interviews) and quantitative data (e.g., Likert scale items and engagement counts). Multiple data (i.e., surveys, follow-up interviews, observation notes, and reflection assignments) were used to triangulate the interplay of PSTs' participation in feedback sessions in relation to the PSTs' behaviors and attitudes demonstrated in mathematics methods and during student teaching.
In order to answer the first research question concerning participants' prior experiences and perceptions of peer feedback, we conducted a survey. To answer the second question of how the participants' feedback content changed as they experienced the PRT model we conducted a survey, made observations of feedback sessions, and reviewed PSTs' written reflections. To answer how participants' peer feedback changed as they experienced the PRT model and how peer feedback impacted PSTs' learning, we focused on the number of students that demonstrated active participation to represent the engagement level of participation over time. Lastly, we conducted follow-up interviews with students, instructors, and field supervisors in order to complement written and observed data.

The Feedback Model and the Procedure
The PRT model was developed by adapting the Small Group Instructional Diagnosis (SGID, [48,49]), which was a method of feedback on faculty instruction developed at the University of Washington. The SGID feedback system involves using facilitators to conduct group interviews to get student feedback for instructors on the courses' strengths, areas for improvement, and suggestions for change. In principle, SGID provides a set of procedures designed to review teaching as formative evaluation and build student consensus via classroom interviews toward an individual's effectiveness in teaching in a guilt-free environment where the instructor is not present. However, the model is not necessarily meant to increase students' learning of teaching; thus, students may evaluate instructor's teaching to "pass judgment but rather to diagnose problems, to enrich the teaching and learning environment, and to promote collegiality" [49]. In order to implement a PRT model for preservice teachers, this study revised the SGID method such that our model provides meaningful opportunities for PSTs (not as students but as peers) to inform and improve their own teaching by drawing on the dialogs of teaching demonstrated by their peers. In particular, our PRT model uses multiple evaluators to build consensus and rely on anonymous peer feedback to increase critical feedback. The detailed procedures of the PRT model in the methods course are as follows:

1.
Establish a shared understanding about what constitutes good teaching.

2.
Use key assignments such as writing lesson plans and micro teaching highly relevant teaching tasks. 3.
The PST (the presenter) conducts a mock teaching assignment (i.e., micro teaching) for 20-30 min.

4.
Peers play a role as schoolchildren at an appropriate grade level for the presentation. 5.
After the teaching task is complete, the presenter leaves the room. 6.
The peer group participates in a feedback session facilitated by the instructor (or a volunteer peer), and a volunteer student takes session minutes. A common rubric is used to structure feedback.
• Feedback focuses on strengths, weaknesses, and suggestions.

•
The participants are encouraged to use course discussions and readings to present and support opinions, reflect on their own teaching practices, and suggest specific strategies to improve weaknesses.

7.
The presenter returns and the instructor highlights positives briefly. 8.
The instructor schedules a follow-up meeting with the presenter to examine positives, negatives, and recommendations on areas for improvement. The peer group participants, including the presenter, provide written reflections about their learning experiences in the PRT model.
These procedures were reiterated and finalized during a pilot study over two semesters. During the pilot study several variations of the PRT model were used before the final version of the PRT model used in this study. For example, in the original model, instructors asked PSTs to facilitate feedback sessions because facilitating a group discussion could serve as a learning opportunity to develop leadership skills. We thought PSTs might respond differently when their peers facilitated feedback sessions instead of the instructor.
However, we found that the level of participation was about the same regardless of the facilitator. Thus, for the current study, participants were encouraged to volunteer as facilitator and instructors facilitated when there was no volunteer. Table 2 shows how salient features of the PRT model are supported by the research introduced in the literature review section of this article. • Characteristics of effective feedback in five clusters [28] • The presenter leaves the room during feedback session • Discomfort with face-to-face situations [10,[20][21][22][23]50] • Feedback should provide strengths, weaknesses, and specific recommendations.
• A balance between positive and negative remarks [34][35][36][37]40,41] • Instructor summarizes feedback as content/pedagogy expert and goes over it with the presenter at a later time.
• Objectivity, quality and fairness of the process [29,51] • Key process of PRT Model • Research studies

Participants and Procedure
Eighty-one PSTs participated in the current study over five semesters. The investigator of the study received permission from the institutional review board of the university to conduct this research of preservice teachers with their free and informed consent. Participants were enrolled in middle grades mathematics methods courses at a public university in a southeastern state of the United States from fall 2018 through fall 2020. All of the participants had completed the required course equivalent of a pre-calculus course during their freshman or sophomore year and were in their senior year prior to a field experience course requiring a minimum of 135 h of clinical experience in a local public school. Of the 81 participants for the study, 29  The middle grades mathematics methods courses were taught by three instructors who used a common syllabus. The course was designed to engage PSTs in the theory and practice of teaching while supporting their understanding of pedagogy and issues relevant to the teaching and learning of school mathematics. Assignments included writing lesson plans, unit plans, reading research articles, presenting mathematics lessons, and weekly assignments (e.g., solving math problems, analyzing videotaped lessons, analyzing students' work, etc.). At the beginning of each method course, a survey measuring the PSTs' past experiences and perceptions of peer feedback was conducted. A key assignment of the course was creating a lesson plan for micro teaching. During the micro teaching assignment, PSTs taught a portion of a lesson (20-30 min) to classmates in which they demonstrated classroom teaching skills; after the class observed each peer presentation, they were encouraged to share feedback. All 81 PSTs participated in the PRT model. Each class meeting had one or two micro teaching events followed by a PRT session. For example, the course in fall 2018 had 17 PRT sessions and 19 micro teaching events. We note the study has been influenced by the COVID-19 pandemic during the spring and fall semesters in 2020. Adaptations to minimize the disruptions include online PRT and feedback sessions via Zoom. Although COVID-19 has caused a drop in course enrollment numbers in fall 2020, there were no COVID-19 related withdrawals from the study. Despite some students' comments about their online learning experiences via Zoom, the study did not include the case in the analysis because the impact of COVID-19 on (online) teacher education falls outside the scope of this study.
In addition to micro teaching and participation in the PRT model, participants were asked to complete reflective writings six times during the course of the semester. In their writings they were asked to analyze and reflect on their teaching performance, perceived strengths, challenges faced, and changes implemented to improve teaching. Furthermore, at the end of the semester participants were asked to complete a survey measuring their overall satisfaction with the PRT feedback experience.
Follow-up meetings were arranged during the period when the PSTs were placed in field experience. In total, follow-up interviews were composed of 25 PSTs (31%), 3 instructors, and 5 field supervisors. The participants who indicated an interest in attending the interview in the permission form were invited, with no incentive provided for participating. The same interview protocol was applied in each semester of the study.

Data Collection
Data sources in this study included PSTs' responses to pre/post surveys, observation notes, session minutes, reflection assignments, and follow-up interviews.

Surveys
Two surveys were used (see Appendices A and B), one at the beginning and another at the end of the semester. In the beginning of the semester, PSTs were asked to report their past experience and perception of peer feedback. Regarding their prior experience, PSTs listed all of the peer feedback methods and formats in which they participated. They also rated their overall past experience of peer feedback in terms of meaningfulness and valuableness of the learning opportunity by using a Likert scale of 1-5. The participants were also asked to respond in a commentary box regarding the impact of a presenter remaining in the room and using writing as primary feedback tool. A second survey was administrated at the end of the course to measure overall satisfaction with the PRT feedback experience. Participants were asked to respond in a commentary box regarding the degree to which the absence of the presenter affected their feedback behavior and the factors that allowed them to participate in peer feedback more meaningfully, as well as how the experience influenced their own learning in the methods course. Both surveys were anonymous. The response rate for the first survey was 78% with 63 surveys completed out of 81 surveys distributed, and the rate for the second survey was 75% with 61 surveys completed.

Observation Notes
The notes were taken by three research assistants who completed at least one graduate level qualitative research methods course in the doctoral program. The research assistants observed feedback sessions four times at random per course, taking free notes on settings/interactions to capture concrete, detailed, and textured descriptions of how PSTs participated in the PRT feedback model. The observer stayed only during the PRT session and the notes were used for agreement on the operational definition of meaningful participation. Both the research assistants and the class were informed about the study and research questions. The study also used session minutes to calculate the level of participation. The minutes indicated the names of those who provided feedback and brief description of feedback.

Reflective Writings
The writing assignments of each participant were collected six times during the semester. The first five assignments asked PSTs to analyze and reflect on their teaching performance, including their perceived strengths, challenges faced, and changes implemented to improve teaching. PSTs were also asked to make connections to the research readings provided by the instructor. There was one writing assignment given to PSTs who agreed to participate in the study asking them to evaluate the PRT feedback model and reflect on their experience engaging with it.

Follow-Up Interviews
Follow-up interviews were conducted twice per course after the course was complete and students were in their fieldwork. First, a follow-up interview session was designed for PSTs to respond to researchers' clarifying questions analyzing the written responses of surveys. A second interview session was designed for instructors and field supervisors to provide their comments about the feedback model and its impact on PSTs' learning. The following are two representative questions from the second interview: "(1) Interviewer: Some participants said, "I felt I was treated professionally when everyone's involved and serious about a colleague's teaching performance." Can you relate to this statement or help us better understand this statement through your own experience? (2) Interviewer: Can you (as a field supervisor) describe how the PRT model impacted your facilitation of the participants' learning of student teaching"?

Data Analysis
The first survey responses were analyzed in order to examine the first research question concerning participants' prior experiences and perceptions of peer feedback. In order to answer the second research question concerned with how participants' feedback content change as they experience the PRT model, PSTs' responses to the second survey questions and observation notes including thick descriptions and written reflections were analyzed to identify changes and suggest emerging patterns of peer feedback as demonstrated by the participants.
The survey response analyses and written reflections involved four processes: (1) an initial reading of each participant's response, (2) identifying themes and exploring the subcategories, (3) coding the themes and subcategories, and (4) quantitatively and qualitatively interpreting data [52]. A theme was decided only when the same theme appeared in both the written reflections and survey responses at least 20 times (about 30% of the total number of survey participants) by different participants and were verified by the description notes.
To answer how participants' peer feedback changed as they experienced the PRT model and the impact of peer feedback on PSTs' learning, we also focused on the number of students who demonstrated authentic participation in order to represent engagement levels of participation over a period of time. The researchers who observed played a role in devising the working definition of authentic participation. We considered it authentic when PSTs made feedback comments supported by evidence and analysis. For example, we did not consider feedback authentic if a PST said, "I like it. I think he did a nice job," primarily because the comment did not show evidence for judgment. We did count it authentic when a PST said, "His warm-up was really neat because [the class] keeps going back to the warmup question and learned to apply to the new law of exponents, dealing with when there is power of a power," because the comment included evidence supporting the evaluative statement. We also considered it authentic when PSTs provided comments supporting other opinions or to sharing their personal life or academic experiences. Active listening was also considered authentic participation when PSTs paid attention to peers' commentaries and took notes. The session minutes were used in addition to the observation notes.
Another piece to the analysis was the number of participants who provided feedback. Percent scores were calculated by dividing the number of those who provided feedback at least once by the number of those who attended the session. For example, the first feedback session of the course during fall 2018 was recorded as 23% (see Figure 1) because three people provided feedback out of thirteen attendees. ments supporting other opinions or to sharing their personal life or academic experiences. Active listening was also considered authentic participation when PSTs paid attention to peers' commentaries and took notes. The session minutes were used in addition to the observation notes.
Another piece to the analysis was the number of participants who provided feedback. Percent scores were calculated by dividing the number of those who provided feedback at least once by the number of those who attended the session. For example, the first feedback session of the course during fall 2018 was recorded as 23% (see Figure 1) because three people provided feedback out of thirteen attendees. The study conducted follow-up interviews with students, instructors, and field supervisors in order to answer the second research question. Interview data were analyzed in a similar way by identifying themes in the analysis of written responses such as the initial reading of each participant's response, identifying themes and exploring subcategories, and coding themes and subcategories. The preliminary findings of this study were then presented to all participants during follow-up interviews, and the participants voted yes or no to indicate their agreement with each statement. We accepted the findings when the following two conditions were met: (1) More than the half of the participants of the same group agreed, and (2) at least two groups agreed with the majority of the votes.

Limitations of the Study
The first concern is that the majority of participants was female, which could play a role in the way the participants perceive their experience of peer feedback. This could influence the outcome of the study concerning gender differences in the form of resolving interpersonal conflicts, processing critical feedback, and verbal communication styles. Second, a random sampling of preservice students in the teacher education program was not conducted since all students enrolled in the mathematics methods courses agreed to participate in the study. Before generalizing the findings, it would be appropriate to conduct additional studies including a larger sample from more university-based teacher education programs in the country. The study conducted follow-up interviews with students, instructors, and field supervisors in order to answer the second research question. Interview data were analyzed in a similar way by identifying themes in the analysis of written responses such as the initial reading of each participant's response, identifying themes and exploring subcategories, and coding themes and subcategories. The preliminary findings of this study were then presented to all participants during follow-up interviews, and the participants voted yes or no to indicate their agreement with each statement. We accepted the findings when the following two conditions were met: (1) More than the half of the participants of the same group agreed, and (2) at least two groups agreed with the majority of the votes.

Limitations of the Study
The first concern is that the majority of participants was female, which could play a role in the way the participants perceive their experience of peer feedback. This could influence the outcome of the study concerning gender differences in the form of resolving interpersonal conflicts, processing critical feedback, and verbal communication styles. Second, a random sampling of preservice students in the teacher education program was not conducted since all students enrolled in the mathematics methods courses agreed to participate in the study. Before generalizing the findings, it would be appropriate to conduct additional studies including a larger sample from more university-based teacher education programs in the country. Table 3 shows how PSTs rated their overall past experience with peer feedback in terms of meaningfulness and value of learning opportunity in response to the following instruction: "Reflecting on your overall past experience in previous courses, please indicate how meaningful (or valuable) your experience in peer feedback was." Around 66% of the PSTs expressed lack of meaningfulness and 50% reported lack of valuableness to peer feedback prior to involving the PRT model. Regarding peer feedback formats, 83% respondents (n = 52) indicated that they had previously experienced paper-pencil based feedback with rubrics or prompts. Other formats included co-editing, group grading, and voting for the best. Most respondents (97%, n = 61) reported that they had no opportunity to provide peer feedback with the facilitator while the peer on the receiving end was absent, which implies our PSTs might face difficulty in offering critical feedback to classmates as noted from previous studies (e.g., [21,50]). Analyses of their written responses concerning the situation in which the presenter remains in the room confirm this interpretation. Table 4 lists four constraints repeatedly mentioned by the respondents based on their past experience with feedback: Shallow comments, Lack of critical feedback, Sense of disconnect, and Low participation. While 46% of the respondents (n = 29) expressed difficulty in providing detailed feedback or authentic feedback due to their lack of knowledge, the second most common difficulty was the lack of critical comments. Thirty-five percent of the respondents (n = 22) expressed difficulty in providing critical feedback when the presenter was present. The rest of the PSTs also expressed a low level of willingness to provide feedback or participate in the process. Table 5 presents the ratings of meaningfulness and valuableness of peer feedback that respondents experienced through the PRT model over the semester: "Please rate your overall experience of peer feedback in this course. How meaningful (or valuable) was your experience?" The majority of respondents reported a high level of meaningfulness (about 73%) and valuableness (about 75%) of feedback through the PRT model by choosing "very much," or "a great deal".

Perception Change on the Peer Feedback
Our PRT model asked the presenter to leave the room during the peer feedback process. Regarding the situation in which the presenter leaves the room, about 78% of the respondents (n = 48) reported a positive impact of anonymous peer feedback by choosing "very much" or "a great deal" as suggested in the previous studies (e.g., [21,30,32]).

Level of Engagement
Regarding the change of participant feedback while experiencing the PRT model, we found an overall pattern of increasing participation in all three methods courses. Figure 1 illustrates the different levels of participation by providing the percent of those who contributed comments in the discussion for each session.

The Efficacy of the PRT Model
Regarding the efficacy of the PRT model, four themes emerged from PSTs' responses: (1) Specific details of teaching (n = 53), (2) Authentic peer feedback (n = 42), (3) Reflective attitude (n = 39), and (4) Professional practice of feedback sharing (n = 55). The frequency was also reported-the reflective writing assignments were used to determine the frequency. The first two themes may be supported by Thurlings et al. [28] who identified the characteristics of effective feedback. The other two themes, reflective attitude and professional practice of feedback sharing, were drawn from the participants' comments and may be added as components of effective feedback. Shown below are representative comments in which the proposed theme is evidenced by underlined words and phrases.  PSTs focused on the specific details of their teaching. These details afforded opportunities to analyze teaching decisions in the broad context of middle grades mathematics curricula in order to address the needs of students in the fieldwork.
"Within my micro teaching lesson, my peers seemed to have concerns about the focus . . . I agree that there were several different topics addressed, but I felt that there were several areas (order of operations and inverse operations) that would be helpful if reviewed before presenting the concept of solving equations. I do agree that I should not have focused on expressions versus equations or numerical versus algebraic equations." "My peers thought the [warm-up] strategy may not have been completely effective or some of the information may have been lost in translation when going from angles into triangles. A triangle has three interior angles. I hoped the class could figure out people categorize triangles by angles and by sides as they reviewed the types of angles. Not so fast. Maybe I should have started with asking the class to describe the triangle and extended to key properties. Their description will help them notice sides, angles, interiors, exteriors, etc. After all of these, perhaps the students were ready for sorting triangles . . . I began to realize that a lot of what we do as teachers are also about understanding [how] middle graders think and learn." "As a presenter, I would feel a little uncomfortable sitting in the room as my peers discussed my performance. There are some items that I would have wanted to defend but would not have wanted to sound defensive. It would also be hard to hear praise and wonder if it were truly heartfelt or if they were simply saying it because I was sitting there." "[As] a peer observer, I felt that I could be totally honest about the performance since the presenter was not in the room. I didn't feel that I needed to modify my opinion in fear of hurting someone's feelings. I also knew that I wanted to give careful thought to my comments so that there would not be unnecessary criticism given to a presenter. I wanted my critique to be helpful but not harsh." Theme 3: Reflective attitude emerging in the PRT model PSTs demonstrated reflective attitudes as peer groups provided consensus regarding their teaching performance and suggested ways to improve. Reflective attitudes were increasingly evident in multiple feedback sessions (provided below) in which reflective and analytical dialogs enabled PSTs to focus on the growth of their teaching skills rather than defending their practices.
"It was also nice to know that there were some of the positive feedback about my classroom management and making the students feel at ease in my classroom . . . As I am feeling no confident in this area, I am now more focused on perfecting student questioning and allowing time for students to gather thoughts and respond to questions. This is one area that I had not really considered prior to this class and am definitely still weak. While I understood that it was important, I didn't have any tools or resources to help build these skills . . . I am excited about growing in this area of my teaching abilities and skills." "[Feedback sessions] did help me start thinking about growing as a professional teacher. It helped me observe and see things that quite frankly I never thought about before until now. . . . Who am I to criticize my peers? We watched many teaching demos and the things that I saw my peers struggling were timing and teachable moments. Eventually, I started thinking about my own teaching, my classroom, and the kids I will be teaching . . . My peers seemed to all have the energy and confidence while teaching. I know [nobody's] perfect. We watched someone teach and discussed the teaching as if we were teaching it. So there is no hard feeling because we are helping one another to review what kinds of mistakes were made and to improve with analysis." Theme 4: Professional practice of feedback sharing conceptualized in the PRT model PSTs began to notice feedback sharing as a professional practice of teachers. This seems partly empowered by the shared goal of improving teaching among fellow PSTs as opposed to an evaluative, therefore vulnerable, setting where PSTs have limited opportunities to critically examine their teaching.
"When I think about this . . . people look at how you teach and make comments. [Professors] always talk about professional practice, professional practice, etc. all the time. I sort of begin to think about it-professional community and teaching as professional career . . . " "I felt like I could speak openly about the performances, which should be a lot more beneficial than just saying everything was okay. It helped me to grow as a professional teacher because it made me realize where my weaknesses are and different things to be aware of when planning and implementing my own lessons. We did [nit-pick] each other, but those conversations were so beneficial for the people in the room; we learned so many do's and don'ts from being that candid. . . . [It] was helpful to get the feedback on how we were seen by our peers teaching along with how [professor] analyzed the teaching like professional consultants. . . . . There is something only experts could see, but there are other things interns could see as important. For most of us this was our first real time planning and implementing a lesson which I know was quite [nerve-racking] for most but it is great to know we could still talk like we are adults, [professor] supports and challenges, and we do the same to him." Aligned with the four themes of efficacy in the PRT model, Table 6 presents a list of thematic comments on the impact of the PRT on PSTs' learning in mathematics methods courses or field experiences. These comments are supported by PSTs, instructors, or field supervisors to validate the PRT model.

Discussion
With respect to the degree to which the PRT model was successful with engagement, we observed a pattern of increasing participation as the course progressed (see Figure 1). One may argue that such a pattern is not surprising because participants participate more as they became comfortable with classmates, classroom environments, or course materials; however, the instructors reported a consistent low level of participation before the PRT model there. For one, PSTs perceived paper and pencil-based peer feedback with rubrics neither meaningful nor valuable. There are several factors of passive participation that correspond to the reasons why PSTs did not value peer feedback in the past [28,35]: first, PSTs exhibited discomfort in providing critical feedback while the peer was present in the room; second, PSTs felt they did not have authentic opportunities to improve their work or performance by using feedback.
Then, what are the possible factors of the PRT model that motivated preservice teachers to more willingly contribute during peer feedback? Our analysis indicates that the PRT model was able to provide authentic and effective environments of peer feedback, which is related to the five characteristics (i.e., feedback, task-related, timing, affective/emotional, and effect on learners) of effective feedback [28]. For example, the PRT model encouraged peer feedback to be specific, well-balanced, relevant, and data-based. As for the appropriate timing of feedback, the feedback was performed immediately after micro teaching. The PRT model also allowed feedback to be task-related, as the methods course's key outcome was the micro teaching task. Presenters were expected to demonstrate qualities of effective teaching that were emphasized in the course, which served as engaging and relevant contexts for those preparing to be certified for teaching in the near future. Feedback also focused on strengths, weaknesses, and suggestions, so that various perspectives supported by course discussions and readings and suggestions of specific strategies to improve weaknesses were encouraged.
The findings of this study not only reflect the work of Thurlings et al. [28] on effective feedback, but also add to the literature by extending the affective/emotional domain of Thurlings' [28] five characteristics. We substantiated the benefit of implementing PRT in the "absence of the presenter". To lessen discomfort for peer-evaluating PTSs, a primary feature of the PRT model was to ask the presenter to leave the room so that PSTs could comfortably critique and analyze their peer's performance without the risk of upsetting or offending the presenter. Asking the presenter to leave the room created an effect of de-individuation [31] that helped to establish an intellectually safe place for PSTs to analysis and take peer comments. Over time, PSTs' cynicism towards peer feedback ameliorated and PSTs began to participate in feedback sessions more actively. Here, we argue that PSTs' increasing engagement in peer feedback is not so much a product of their growing comfort in the process as a result of the relationship and trust that had formed when PSTs found the feedback offered genuine and helpful.
Whether PSTs are comfortable or uncomfortable with feedback, in the greater scheme of feedback as an essential tool to inform and improve their teaching, may not be important as long as teachers recognize the benefits of the practice and become the active participant in peer feedback. Nonetheless, the discomfort that PSTs have experienced while providing face-to-face feedback is bound to be felt by future teachers when they critique students' work or co-teach with colleagues. In their past experiences of evaluating peers presentations critical feedback had been avoided because the presenter remained in the room, and this sustained a level of discussion that was superficially complimentary. This study concludes that such conditions have led some PSTs to remain aloof and unable to recognize peer feedback as a significant part of their learning.
The fact that nearly 80% of the participants believed that the absence of the presenter played a positive role in their feedback development lends credence to the view that some psychological barriers may exist when PSTs are in a position to be critical about a peer's performance. This also demonstrates how much PSTs think and act in a sensitive manner to their learning environments. In other words, passive participation may not be caused by PSTs' inability to embark on a reflective process but is more likely to be due to psychological barriers prohibiting PSTs from fully engaging in tasks such as peer feedback. For instance, PSTs' vulnerability might stem from a lack of experience with performance analysis or a lack of confidence in their knowledge and skills related to teaching [53]. It is also possible that PSTs have yet to recognize their learning as a process and misunderstand the opportunities of teaching demonstrations as high-stake evaluative tasks; when in fact, they are collective reflective processes for developing teaching skills [54].
The PRT model demonstrated that regularly participating in non-evaluative performance analysis enables PSTs to remain detached from grades and use the analysis and advice they receive to inform their teaching. Over time, it was noticed that PSTs began to apply their experience of peer feedback to their teaching in their clinical experience. In the study, PSTs grew increasingly comfortable with critical feedback and frequently referred to discussions during peer feedback in meetings with instructors and field supervisors while student teaching. In this way, the PRT model empowered the instructors and supervisors in providing expert guidance, sharing professional perspective in reflective critique [55], and using PSTs' performance as a basis for reflection. Our findings highlight the potential of using practice of peer feedback as an authentic experience of sharing the concerns and challenges of teaching and working together towards a solution.

Conclusions
The tangible impact of reducing the discomfort of having the presenter in the same room lends credence to the view that affective components in feedback do have the potential to increase effort, motivation, or engagement in feedback. Furthermore, feedback models should be sensitive to fostering a learning environment that is in consideration of agents, types of information and knowledge, methods to mediate effective, and authentic communication [44,45]. Overall, the study contributes to the body of knowledge for peer feedback in teacher education by supporting the view that PSTs do have the potential for critical reflection in feedback sessions when feedback is less evaluative and more informative. Effective feedback sessions with PSTs should consider the characteristics of effective feedback and involve analysis through consensus seeking and intellectual dialog with support from the instructor.
For future researchers, these findings may necessitate more research on feedback models involving teachers at different stages of their teaching careers and the role of gender in critical feedback. This study did not examine how PSTs improved their work after peer feedback with a new opportunity. In the short run, a future study can examine the impact of using peer feedback on learning outcomes (e.g., what are the specific ways in which micro teaching experiences can impact PSTs' performances in student teaching experiences and how do the comments on previous micro teaching presentations influence subsequent presentations as the sessions progress?) In the long run, multiple international studies can examine how teachers in different countries respond to various feedback models; this line of work will prove to be significant in detailing the essential aspects of peer feedback in various cultural settings. Ultimately, teachers improve in teaching with experience, and feedback adds much to the experience. Further research on how teachers value critical feedback and PSTs feel empowered in the process of feedback exchange may create more ways to provide effective learning experiences for teachers.
If teacher education is committed to building critical professional communities as a change agent for sustainability [56], then this study certainly demonstrates an evolving model for preservice teachers in their pre-professional courses. We assert that the PRT model will effectively facilitate critical feedback with PSTs, enabling teacher educators to create the authentic learning opportunities to share critical feedback as part of reflective and sustainable practice [57] and fostering meaningful relationships and trust in the teaching profession.