The Van Hiele Theory and Realistic Mathematics Education: As Teachers' Instruction for Teaching Geometry

Geometry is one of the branches of mathematics lessons learned in school. The teaching geometry in this research that is on teaching and learning of the line and angle material at grade VII Junior High School. The result of this research describes how teachers' instruction for teaching geometry using a combination of the van Hieles' theory with realistic mathematics education (WE). This research is a development research using ADDIS development model (Analysis, Design, Development, Implementation, and Evaluation). This research was conducted at one public school in North Lombok Regency of Indonesia with the subject of research as many as 22 students. There are three aspects that we want to know related to students' responses with using the Van Hieles' theory combination with RME, namely the understanding of the material being studied, students mathematical connection ability, and the interest in the method.