Using Problem-Based Learning Activities and Experimental Set to Promote Learning Achievement And Problem-Solving Skills of Grade 9 Students

Abstract

This research aimed to: (1) compare the learning achievement before and after using problem-based learning and experimental set on the topic of Waves and Light of grade 9 students and, (2) compare the problem-solving skills before and after using problem-based learning and experimental set on the topic of Waves and Light of grade 9 students. The research sample is grade 9 students at Deebuk Phangnga Wittayayon School, first semester of 2021 academic year about 40 students. The research instruments consisted of problem-based learning lesson plans on the topic of Waves and Light, an experimental set on the topic of Waves and Light, a learning achievement assessment, and a problem-solving skill assessment. The research methodology was one group pretest–posttest design. The research data was analyzed through mean, standard deviation and t-test dependent.

          The results were as follows: (1) The learning achievement, the post-test score is higher than their pretest scores at the statistically significant level of .05. (2) The problem-solving skills, the post-test score is higher than their pretest score at the statistically significant level of .05.