THE DEVELOPMENT OF LEARNING MATERIAL USING PROBLEM BASED LEARNING TO IMPROVE MATHEMATICAL COMMUNICATION ABILITY OF SECONDARY SCHOOL STUDENTS

The purpose of this study is to determine: (1) increasing mathematical communication skills among students by problem-based learning, and (2) answering process students in solving mathematical communication problems by problem-based learning. The research was conducted in SMP Negeri 23 Medan, with 80 students as subjects. This study was development research. The object of this research was a learning material about statistics materials based on a problem-based learning developed which were Teacher Handbook, Student Book, Student Worksheet, and student’s mathematical communication skills test. The instrument used consisted of a test of mathematical communication skills. The instrument has been declared eligible in content validity and reliability coefficients. Based on the results of the analysis obtained, found that: (1) There was increasing students' mathematical communication skills by problem-based learning, and (2) Answering process of students in problem-based learning in trial 2 was more varied compare to trial 1.