Özet:

Advanced clarification is an essential part of thinking skills relevant to students, which contains the ability evaluate, make decisions and make arguments. This ability is needed to prepare students to face the VUCA era. Clarity Learning Model (CLM) is a formulation of IBL, and the strengthening of reasoning abilities aims to improve advanced clarification abilities in physics courses. The purpose of this study is to test the validity and reliability of Clarity Learning Model. The method used in this study is a validation technique which is part of the research and development model. The results of this study are valid and reliable Clarity Learning Model as an instructional design to develop further clarification on critical thinking skills. This model is still valid and reliable as instructional design in theory and material substance. Clarity Learning Model needs to be empirically tested to determine the practicality and effectiveness of the learning model.          Keywords: Inquiry-based learning, reasoning, validation technique, advanced clarification, physics courses

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