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This type of research is Research and Development (R & D), the aim of which is to produce a HOTS-based Textbook on CAD courses that are valid and practical. The development model used is the ADDIE development model, namely an acronym for Analyze, Design, Develop, Implement, and Evaluate. This product validation was carried out by 2 experts, namely material experts and media experts. The product trial subjects were students of Mechanical Engineering Education batch 2018. This trial was conducted in one to one and small group trials. The results of the development of the material expert validation show that the HOST-based book development assessment gets an assessment score in the very good category and the media expert's assessment is also in a good category so that HOTS-based book products are said to be valid. Evaluation of a one to one trial in the "Good" category, Small Group Trial in the "Very Good" category. So it can be concluded that HOTS-based CAD textbooks are said to be valid and

Developing Textbook Based on Higher Order Thinking Skills for Computer Aided Design Course