DEVELOPMENT OF MATHEMATICS LEARNING DEVICE WITH GUIDED DISCOVERY MODELS ON CIRCLE MATERIAL

Abstract

The research conducted is a development research that adapts to the model by Plomp development model
(2010) which consists of3 phases, they are the preliminary research phase, the prototyping phase, and the
assessment phase. The purpose of this study is to find out how the process of developing learning devices
and how the results of the development of mathematics learning tools in junior high school level that apply
guided discovery models for circle that meets valid, practical, and effective criteria. In this study, researcher
uses several instruments such us Learning Implementation Plans, Student Worksheets, and Assessment
Sheets; observation instrument sheet of the implementation of learning; students’ questionnaire response
instruments and the instrument of validation sheet. The results of this study is junior high school
mathematics’s learning tools on the circle material using the guided discovery model. This learning tool
has been validated by experts and received positive responses from both teachers and students when
applied in class. So, the mathematics learning device withguided discovery models on this circle material
has fulfilled valid, practical, and effective criteria.