The effectiveness of e-learning based on SETS to improve students' critical thinking skills in optical instrument material

Learning method affects learning outcomes, to obtain an effective and interesting learning process require an innovative learning method that is easily understood by students, namely by using learning media. This research applied Edmodo media, which was expected to improve student learning outcomes in SMA Terpadu Wira Bhakti of Gorontalo. The main objective of this research was to measure the effectiveness of e-learning based innovative learning sets with Edmodo to improve students' critical thinking skill in optical instruments material in SMA (Senior High School). The method used was Research and Development (R & D), with one group pretest-posttest design. The developed learning sets were syllabus, lesson plan, teaching material, Student Worksheet, Learning Outcomes Test, and assessment instrument. The research finding and analysis showed that the improvement in students' critical thinking skills on social media was very high, where the average N-gain value was 0.72. Based on the previous finding, it could be concluded that e-learning-based innovative learning set with Edmodo was effective to improve students' critical thinking skills in the material of the optical instrument.