The effectiveness of OR-IPA teaching model to improve students' critical thinking skills on senior high school physics subject

The OR-IPA Teaching Model is a learning that has been developed specifically to improve students' critical thinking skills in senior high school physics subject. The objective of this research is to analyse the effectiveness of OR-IPA Teaching Model towards the alteration of students' critical thinking skills on senior high school physics subject. This research used one group pre-test and post-test from 150 students of the first grade of Cerme State Senior High School in 2017/2018 academic year which divided into 5 groups. Students' critical thinking skill has been measured using Critical Thinking Skills Assessment Sheet (CTSAS) with critical thinking skill indicator. Wilcoxon test, n-gain, and Kruskal-Wallis tests are the techniques to analyse the data. The results of this research verified that: 1) There was an improvement in students' critical thinking skills on α = 5%; 2) The average score of n-gain students' critical thinking skills is .83 (high category), and 3) There was no significant difference (there was consistency) of n-gain students' critical thinking skills on senior high school physics subject in all groups. Therefore, OR-IPA Teaching Model has proven its efficacy to improve students' critical thinking skills on senior high school physics subject.