Development of Teaching Materials Based on Two-Column Proof Strategy on Congruent Triangle Materials

Abstract

The purpose of this study is to produce a evidence-based learning instrument using a two-column proofs strategy on congruence of triangles material that is oriented on student reasoning capabilities that meet valid and practical criteria. Research subject is class IX SMPN1 Palembang. This type of research and development uses ADDIE development models to go through the 5 stages of trajectory covered, analyze, design, development, implementation, and evaluation. The results of the expert validation and one-to-one test suggest that the learning instrument developed reaches valid and practical categories.