N. Priyatno, I.M. Arnawa, N.N. Bakar
Based on observations, interviews, and preliminary analysis conducted, it showed that students' mathematical problem-solving skills were still not satisfying. This was caused by the teaching materials used by teachers in teaching have not helped students a lot in understanding mathematical concepts and properties. Based on these problems, the main objective of this research is to produce a practical mathematics learning devices in the form of RPP and LKPD for junior high school students based on problem based learning (PBL) and geogbra-assisted. This study was research and development (R&D) conducted with the Plomp development model. The subjects of this study were the student's grade viii SMP Negeri 25 Padang. Based on the R & D that has been carried out, it obtained that the learning devices (RPP and LKPD) were valid and practical. © Published under licence by IOP Publishing Ltd.
Department of Mathematics Educations, Universitas Negeri Padang, Indonesia; Department of Mathematics, Universitas Andalas, Padang, Indonesia
