DEVELOPMENT OF LEARNING DEVICES BASED ON INFERENTIALISM TO IMPROVE STUDENT’S MATHEMATICAL REASONING ABILITY

Abstract

The purpose of this study is to find out: (1) how the quality of learning devices based on inferentialism is developed, and (2) the application of learning devices developed on the basis of inferentialism can improve the mathematical reasoning abilities of students. the students?. This research is development research using Thiagarajan's development model, that is, a modified 4D model (Define, Design, Develop and Disseminate). The learning devices developed were lesson plans, student activity sheets, student books, and instruments to test students' mathematical reasoning ability. The research instruments were: (a) learning device validation sheets including: lesson plans, student activity sheets, student books, and tests of mathematical reasoning skills; (b) observation sheets to see the teacher's ability to manage student learning and activities; (c) research questionnaires to see students' responses to learning. The results of the data analysis show that the learning devices developed based on inferentialism meet the valid, practical and effective criteria. There is an increase in the mathematical reasoning abilities of the students using the developed learning devices.