Abstract:
This development research used the ADDIE (Analysis, Design, Development, Implementation, and
Evaluation) model. It resulted in valid, practical, and effective PhET-aided problem-based learning
devices to learn vibration and wave materials. The research area was one of the junior high schools in
Gorontalo District in 2021/2022. According to expert validation, lesson plan, student worksheet,
learning material, and critical thinking test components were very valid at a mean score percentage of
> 90%. The mean posttest score of the critical thinking skill of students increased at N-Gain (0.64) in
the medium category for Tryout 1 and (0.73) in the high category for Tryout 2. The increase in the
normalized mean gain was due to a better implementation of the PhET-aided PBL syntax, excellent
student activities, and excellent student responses after the tryouts. In other words, the PhET-aided
PBL model could effectively improve the critical thinking skills of students in vibration and wave
materials. |
