DEVELOPMENT OF LEARNING DEVICES BASED ON PROBLEM BASED LEARNING MODELS ON THE MATERIAL OF SOCIAL ARITHMETIC TO FACILITATE MATHEMATICS COMMUNICATION SKILL FOR CLASS VII SMP/MTs STUDENTS

This research is motivated by teachers who still have difficulty designing learning tools based on the 2013 curriculum. study aims to produce mathematical a problem-based model facilitate students' valid and practical communication skills. Learning are developed in form of syllabus, lesson plan (RPP), student worksheets (LAS). The development used 4-D model, which stages defined, designed, developed, disseminate. test subjects this were 6 class VII students. instrument was validity validation sheet assess appropriateness device practicality response questionnaire using LAS. Based data analysis results, it concluded that mathematics tool very valid, with average rating for syllabus being 3,84, RPP 3,76, LAS 3,72. showed category an assessment 3,61.