Developing LKPD Based on Discovery Learning to Improve Collaboration and Critical Thinking Skills in Class VIII Students at Junior High School

This study aims to describe the feasibility of developing discovery learning-based LKPDs for class VIII students of SMPN 3 Bungku, and to produce LKPDs that can improve students' collaboration and critical thinking skills. This research uses a Research and Development (R&D) approach with the Four D (4D) development model, which involves the Define, Design, Develop, and Disseminate stages, adapted to the characteristics of the subject and development needs in the field. The research design used a nonequivalent pretest-posttest control group design with two classes: experimental and control, to assess the effectiveness of the LKPD development. The results showed that the discovery learning-based LKPD was very valid, with an average of 92.31%. The effectiveness was obtained from the analysis of critical thinking skills using pretest and posttest questions. In the experimental class, an increase of 30.50% was obtained, while in the control class, an increase of 28.34% was obtained. Effectiveness was also obtained from collaboration skills using observation sheets in the experimental class; an increase of 14% was obtained while in the control class, an increase of only 5% was obtained. Practicality is obtained from the results of the teacher's response, which states that the LKPD is practical to use. Then the effect size test obtained a result of 0.80 with a very large effect. So, it is recommended to be able to apply discovery learning-based LKPD more widely in an effort to improve learning, collaboration skill,s and critical thinking at the junior high school level.