Abstract
A contextual approach-based module that consists of five components namely Relating, Experiencing, Applying, Cooperating, and Transferring (REACT) can help students find concepts. This research aims to develop a contextual approach-based module that contains critical thinking skills indicators on salt hydrolysis topics which have content validity and construct validity. Research instruments were construct validity questionnaires analyzed with Aiken V formula and a content validity questionnaire analyzed with CVR approach. The questionnaires were filled by 3 chemistry lecturers and 2 chemistry teachers at SMA 9 Padang. It was found that the average of V score for construct validity was 0.81 showing valid categories, while the CVR and CVI values of content validity were 0.98 and 1 respectively also showing valid categories. Therefore, it can be concluded that the salt hydrolysis module which is based on a contextual approach with REACT components for class XI learning is valid.
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