Development of Learning Materials with Visualization, Auditory, Kinesthetic (VAK) Model to Improve Students’ Mathematics Reasoning Ability and Self-Confidence

Abstract

This study aims to produce: 1) a valid learning materials developed with the VAK model; 2) practical learning materials developed with the VAK model; 3) effective learning materials developed with the VAK model; 4) improvement of students' mathematical reasoning abilities taught using learning materials developed with the VAK model; 5) improvement of students' self-confidence is taught using learning materials developed with the VAK model. This research is a development study using a 4-D model. From the results of trial I, trial II and disseminate stage obtained : 1) learning material developed with the VAK model have met valid criteria; 2) learning material developed with the VAK model meet practical criteria in terms of: a) expert judgment; and b) observations of the implementation of learning material; 3) learning material developed with the VAK model meet effective criteria in term of: a) classical student completeness has been achieved in trial II of 88,57% and the disseminate stage of 91,43%; b) achievement of learning objectives for each item c.) positive student responses to learning materials; d) learning time does not exceed normal learning time; 4) students' mathematical reasoning abilities using learning materials developed with the VAK model increased, in terms of N-Gain scores in trial I by 0.29 increased to 0.34 in trial II and increased to 0.57 at the disseminate stage; 5) Self-confidence of student using learning materials developed with the VAK model increased, in terms of The average result of the self-confidence questionnaire in trial I by 75.91 increased to 78.77 in trial II and increased to 79.97 in disseminate stage.