<![CDATA[This study aims to describe the characteristics, analyze the feasibility, and analyze the improvement of students critical thinking ability using e-module based on socio-scientific issues human reproductive system in learning. This research was carried out at SMA Negeri 1 Demak in the even semester of the 2021/2022 academic year. The type of research is research and development (RnD) using a pre-experimental one group pretest-posttest design. The subjects of this study were XI MIPA 9 to obtain data on student responses to the e-module, and XI MIPA 6 to obtain data on critical thinking ability using pretest-posttest description questions. Sampling using purposive sampling method. The results showed that the characteristics contained in the e-module based on the experts assessement were based on socio-scientific issues, self-instruction, self-contained, adaptive, user friendly, and attractive appearance. The feasibility of material experts is 98.9% with very feasible criteria, media experts is 97.8% with very feasible criteria. The student response to the e-module is 90.9% with very good criteria, the teacher's response is 95.4% with very good criteria. The average of the pretest-posttest of students critical thinking ability was analyzed by n-gain and obtained a score of 0.62 with medium criteria. The conclusion of this research is the development of e-module based on socio-scientific issues human reproductive system material is feasible and effective to improve critical thinking ability of class XI students in SMA Negeri 1 Demak.]]>
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