Abstract
Instructional leadership is crucial for improving teaching quality and student academic performance, especially in secondary schools where Heads of Department (HoDs) play a vital role. Despite this, there is no empirical evidence on how Science HoDs provide instructional leadership in Lesotho. This study looked at the self-reported instructional leadership techniques of Science HoDs in Lesotho secondary schools and whether they vary based on specific demographic and workload criteria. Using a quantitative descriptive survey approach, data were obtained from 67 Science HoDs using a paper-based questionnaire adapted from the Principal Instructional Management Rating Scale (PIMRS). Descriptive statistics and inferential analysis were employed (t-tests and ANOVA). The data indicate that Science HoDs frequently used tactics such as goal planning and communication, curriculum coordination, learner progress monitoring, teaching time management, and instructional resource availability. However, high-impact pedagogical approaches, such as classroom observation, formal written feedback, and systematic evaluation of teacher learning, were less frequently implemented. Except for the number of courses taught, instructional leadership strategies showed no significant differences by age, gender, qualification, experience, teaching load, or school location. The study reveals a preference for administrative rather than pedagogical instructional leadership, highlighting the need for targeted professional development and policy support to improve HoDs’ capacity for sustained instructional practices in science education.