DEVELOPMENT OF LEARNING DEVICES BASED ON PBL OF SETS MATERIAL TO FACILITATE MATHEMATICAL PROBLEM SOLVING ABILITY FOR STUDENTS IN SMP/MTs

In the curriculum for 2013, it is proposed that one of objectives teaching mathematics: learners expected to have problem-solving ability. The teacher increase sudents activation in learning process, especially development ability solve mathematical problems. this context, purpose study create produce devices (syllabus, RPP and LKPD) grade VII set material using model PBL facilitate valid practical criteria was used a 4D (define, design, develop, desseminate). research uses an instrument device validation sheet LKPD). Based on data analysis, concluded problemb based mathematics valid. results 83% syllabus categories, 88% LKPD highly categories. developed declared small group trials with average student response 72% practice.