<![CDATA[Abstract: The development of learning tools based on the Connecting, Organizing, Reflecting, Extending learning model on the wave material of class XI SMA students aims to determine the validity of learning tools based on the CORE learning model. The learning tools developed are the Learning Implementation Plan (RPP), Student Worksheets (LKPD), and Learning Outcomes Tests. The research method used is Research and development (R&D) with the ADDIE type. This research method consists of 5 stages, namely, Analysis, Design, Development, Implementation and Evaluation. Based on the results of this study, the average validity of the lesson plans for meeting 1, meeting 2, and meeting 3 was (3.37, 3.36 and 3.35) with the high category (T), the average validity of the LKPD for meeting 1, meeting 2, and meeting 3 of (3.19, 3.19 and 3.19) with the high category (T), and the average validity of the Learning Outcomes Test of 3.19 with the high category (T). So that learning tools based on the Connecting, Organizing, Reflecting, Extending learning model are declared valid and suitable for use on wave material for class XI SMA students.Key Words: Physics Learning Tools, CORE Learning Model, Wave]]>
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