The rapid development of technology requires education to provide learning that can improve students' critical thinking and ICT (information and communication technology) skills. One of the lessons that can be applied is ICT-based. The material is packed with state-of-the-art technology and computer programming. For this reason, a study was carried out which had the objectives of (1) developing Scratch-assisted Wave teaching materials, (2) testing their validity, (3) testing the practicality of using teaching materials, and (4) testing their effectiveness in improving students' ICT literacy and critical thinking skills. This research is an R&D that has 4D procedures, namely define, design, develop, and disseminate. The product trial used the pretest-posttest control group design. The research instruments consist of the gap test, ICT literacy test and critical thinking skills test. The data analysis technique used in the study are percentage and t-tests. The product in this research is in the form of ICT-based wave teaching materials. Programming applications in teaching materials are in the form of Scratch with a contextual learning approach, namely physical symptoms and phenomena that are closely related to life. The average percentage validity of teaching materials in terms of content is very decent category. The level of readability of teaching materials through gap tests and questionnaires is very easy-to-understand categories. The effectiveness of teaching materials is seen from the increase in ICT literacy and critical thinking skills of high school students who use Scratch-assisted Wave teaching materials are higher than those using ordinary teaching materials © 2023, Journal of Turkish Science Education.All Rights Reserved.
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