Development of Mathematics Learning Tools Using PMR Approach to Teach Trigonometry Comparison for High School Level

This publication contains the core of scientific reports on the results of development research on the application of one of the procedures for developing learning tools to teach the topic of Comparative Trigonometry and presents the results of developing devices that meet valid, practical and effective criteria. Learning tools based on Realistic Mathematics Education Approach on Trigonometry Comparison material were developed using a development model adapted from the development design model of Thiagarajan et al (1974) which consists of 4 stages, namely define, design, develop and desseminate which was adapted by eliminating the 4th stage. due to limited time and research funds. Through the 3 (three) stages of development and 2 (two) rounds of validation and field trials, learning tools were obtained to teach the topic of Trigonometry Comparison for High School Students that met the valid, practical and effective criteria.