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This study aims to examine the feasibility and effectiveness of the development of electronic-book-based Critical and creative reading project to improve students ' critical thinking skills. This study was developed based on the Research and Development (R (2) product development was carried out through the activities of designing materials, models and evaluations that were developed in a product, as well as designing electronic books in accordance with the results of the needs analysis; (3) the appropriateness test results by the material experts obtained 3.40 in the good category and the layout expert scored 4.65 with a very good category. The results of the response test for students after being calculated with the Aiken V formula obtained a score of 0.85 – 1.00 with a very good category. The results of the experimental test showed that the posttests of the control and experimental classes obtained results of 0.001, which showed <0.05, so H0 was rejected. Students' critical thinking skills after the treatment were significantly different. Therefore, the teaching material developed was effectively used to improve students' critical thinking skills.
Himawan et al. (Sat,) studied this question.