TRAIN STUDENTS’ CRITICAL THINKING SKILL THROUGH THE IMPLEMENTATION OF COOPERATIVE LEARNING MODEL TYPE GROUP INVESTIGATION (GI) ON MATTER OF REACTION RATE IN SMA NEGERI 1 MANYAR

Abstract

This study aims to determine the implementation of learning and students' critical thinking skills after the implementation of cooperative learning model type Group Investigation on matter of reaction rate. This research type is Pre Experiment (pre experimental design) and research design used is One-Group Pretest-Postest Design. Target of this research is student of class XI MIPA 6 SMA Negeri 1 Manyar. The instruments used are an observation sheet of cooperative learning model type Group Investigation and sheet of pretest and postest of critical thinking skill. The results showed that (1) The implementation of cooperative learning model type Group Investigation is in good and very good category with percentage in every phase is: in phase 1 was 87.5%; phase 2  was  95.84%; phase 3 which contains stage 1 and  stage 2 of the Group Investigation was 87.5%; Phase 4 which contains stage 3, stage 4, and stage 5 of the Group Investigation was  95.84%; phase 5 which contains stage 6 of Group Investigation was 100%; (2) Students’ critical thinking skill in terms of N-gain shows that 85% of students get high N-gain category and 15% of students get N-gain in moderate category.

Keywords: cooperative learning model type Group Investigation, critical thinking skill, reaction rate.