I. i flipped classroom plays a crucial role in undergraduates’ knowledge, skills, and engagement [1]. the out-of-class activities allow students to control themselves about the learning process to be suitable for their personal needs and learning styles, which can increase the quality of their learning [2]. in a flipped classroom, self-regulation is a significant variable that can positively maintain undergraduates’ academic achievement [3]. jdaitawi [4] observed the effect of self-regulation (sr) on flipped classroom by comparing to the traditional method as a control group. his results revealed that students had greater self-regulation in the flipped classroom as compared to the control group. he further emphasized the significant role of sr, which support the flipped classroom. however, self-regulated skills are a challenging for students. doo and bonk [5] claimed that instructors should pay more attention on undergraduate students with poor self-regulation in flipped classroom. some students cannot complete assignment due to failure of time management, which is a critical skill of self-regulation [6]. time management is related to setting, planning, and managing