Development of Teaching Materials Based on Problem Based Learning Models to Improve Mathematic Problem Solving Ability of VIII Junior High School

This study aims to determine: (1) Describe the validity, practicality, and effectiveness of teaching materials based on problem-based learning that has been developed towards improving the mathematical problem solving abilities of grade VIII students of Junior High School Muhamadiyah 07 Medan; (2) Describe the improvement of students' mathematical problem solving abilities by using teaching materials based on the developed problem-based learning. Researchers developed teaching materials in the form of lesson plans, LKPD, teacher handbooks and student handbooks using the Dick & Carey development model. The results showed that: (1) Teaching materials based on problem-based learning in improving students' mathematical problem solving abilities developed had met the criteria of being valid, practical, and effective; (2) Improved mathematical problem solving abilities using teaching materials based on problem-based learning that have been developed seen from the average N-gain value in the first trial and second trial, respectively 0.43 and 0.56 which are in the category moderate. Keywords: Teaching material development, Problem Based Learning, Problem Solving Ability DOI: 10.7176/JEP/12-16-06 Publication date:June 30th 202