The Developing of Teaching Materials Oriented to Problem-Based Learning to Improve Students’ Mathematical Communication Ability

This research was aimed  to know the validity, practicality, and effectiveness of teaching material oriented to problem-based learning in improving students’ mathematical communication ability. The matery which did not relate the problem on real life context and lacked of students’ mathematical communication ability are the reasons why this reaserch was done. This is a development research.  This research used  4-D Thiagarajan, Semmel and Semmel development research by developing teaching materials oriented to problem-based learning approches. Teaching materials developed were teachers book and students’ book. The trial was done to 32 students on VII-4 and VII-5 classes in SMP Negeri 1 Pangkalan Susu. From First and second trial obtained: (1) According to experts, the teaching materials were valid, teaching materials’ practicality was practical in terms of: a) Validator said that teaching materials can be used with a little revission;  b) Observation result on teaching materials usage was also good, and teaching materials was also effective in terms of: a) students’ learning completeness classically; b) Students’ activeness on tolerance llimit decided; c) students’ response on teaching material components and positive learning activity. (2) Increasing students’ mathematical communication ability on the first trial post-test, from 64.84 became 75.50 on the second trial