PENGEMBANGAN BAHAN AJAR MATEMATIKA MATERI SEGITIGA DENGAN MODEL DISCOVERY LEARNING UNTUK MENINGKATKAN KEMAMPUAN PEMAHAMAN KONSEP MATEMATIK PESERTA DIDIK SMP

Abstract

This research is motivated by the lack of student’s mathematical understanding ability. The alternative to evercome that
problem is developing the teaching material of mathematics learning by the discovery learning models. The purpose of this
research is arranging and developing the material learning that is valid and practice, finding out whether the use of teaching
material that is developed effectivelly in improving VII grade student’s mathematical understanding ability, and finding out
the respons of students to teaching materials. The research used the Research and Development method, by modificating
Sugiyono’s R & D model in teaching and learning design. The population in this research is VII grade the students. The
sample is a classes of them, class VII K as the product trial class, and class VII H as the usage trial class. The instrument
in the research are questionnaire for students and teacher, test for students, and observation sheet. The result of the research
shows that the teaching materials are valid and effective to improve student’s. The student’s responses are positive to the
process of teaching and learning.