| Summary: | <p class="0abstract">This study aims to develop edmodo-based interactive teaching materials as an alternative media for science learning to improve critical thinking skills of junior high school students. This type of research is Research and Development (R&D) with ADDIE (Analyze, Design, Development, Implementation, and Evaluation) models. The research subjects were 28 students of grade VII in Jember district (Indonesia) who were obtained by cluster random sampling technique. Data were collected using validation sheets, observation sheets, critical thinking skills tests, and students responses questionnaires. Data were analyzed using descriptive analysis, normalized gain (n-gain), and paired sample t-test. The results show that edmodo-based interactive teaching materials can be used as an alternative media for learning science in junior high schools because they meet the following criteria: (1) validity, in terms of the validity assessment score of 3.60 (from the range of scores from 0 to 4) in the criteria are very valid, (2) practicality, in terms of the score of learning feasibility of 3.20 in good criteria, (3) effectiveness, in terms of an increase students critical thinking skills were statistically significant at α = 5% with an average n-gain of .71 in high criteria, and student responses of 83% in very good criteria.</p>
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