This phenomenological study examined the lived experiences of English teachers in utilizing microlearning activities to promote student collaboration in public secondary schools in Tagum City, Philippines. Grounded in Cognitive Load Theory, Constructivist Learning Theory, and Social Learning Theory, the study employed a qualitative research design, including in-depth interviews and focus group discussions with 14 purposively selected junior and senior high school English teachers. Thematic analysis revealed that microlearning supported collaboration through lesson chunking, time-bound tasks, peer interaction, and group-based activities, thereby increasing learner engagement and reducing academic anxiety. However, teachers encountered challenges related to limited technological access, unstable internet connectivity, classroom management issues, uneven leadership dynamics, and students’ time management difficulties. To address these challenges, participants implemented adaptive strategies, including flexible instructional delivery, offline learning materials, explicit role assignments, and structured classroom routines. The findings highlight microlearning as a context-responsive pedagogical approach for fostering collaborative learning outcomes.