The purpose of this paper is to determine how to increase Indonesian high school students' motivation for synchronous English learning in EFL classes. The dynamics of an online class were distinct from those of an offline class. Therefore, many students in the EFL class were unprepared for the synchronous meeting, which harmed their motivation to learn. This paper addressed a single research question, namely, how to increase the learning motivation of Indonesian high school students in EFL class during the synchronous meeting. This paper used the Classroom Action Research (CAR) model as its methodology. This study followed four steps: 1) Planning, 2) Action, 3) Observing, and 4) Reflecting. In conclusion, various learning dynamics render some students unprepared for this, which affects their motivation to learn. Two factors can contribute to students' motivation to learn. First, the learning aid used in the synchronous meeting, a PowerPoint presentation, should be more engaging. Second, by incorporating Mentimeter, class activities should become more interactive.