Özet:

This study aims to develop a STEM-CP based virus material textbook for grade X SMA students. The textbook is organized into a contextual textbook with problem-solving characteristics in the material Virus. Virus material was chosen based on contextual problems that are being faced by the world community, namely the COVID-19 pandemic. Therefore, students are expected to be be able to master material regarding the structure of the virus, as well as hone students critical thinking skills to solve problems in the right efforts to tackle the COVID-19 virus. The research method is Quasi Experiment with Pretest-Posttest without a control class. The data analysis was carried out by using mixed methods, which is the result of qualitative and quantitative data. The sample used was 30 students of class X SMA with problems. These results can be seen from the scores obtained by students. The prettest results of students critical thinking abilities before using STEM-CP-based virus textbooks were relatively low, namely 2,5 Unacceptable, but after using the value of students critical thinking skills relatively increased, namely 3,8 category Acceptable. This shows that the critical thinking skills possessed by students are better after students learn viral material using virus textbooks that are applied in learning. iresults of the N-gain scores of students in the Dessiminate class with an overall average of 0.80 in the high category This shows that STEM-Cp-based viral textbooks are effective in improving students cognitive abilities.

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