Development of Geogebra Assisted Problem-Based Learning Tools to Improve Mathematical Critical Thinking Ability and Self-Efficacy of Students at SMP Negeri 1 Stabat

Abstract

This study aims to: 1) produce quality problem-based learning tools (valid, practical and effective) for grade VII students of SMP Negeri 1 Stabat; 2) Analyzing the improvement of mathematical critical thinking skills of SMP Negeri 1 Stabat students after being taught using Geogebra-assisted Problem-Based Learning tools; 3) Analyzing the increase in self-efficacy of SMP Negeri 1 Stabat students after using the Geogebra-assisted Problem-Based Learning tool. This research is categorized into development research using the Thiagarajan 4D learning device development model (four-D models). This research was conducted at SMP Negeri 1 Stabat in the even semester of the 2021/2022 academic year. The results showed that: 1) Geogebra-assisted problem-based learning tools in improving students' mathematical critical thinking skills and self-efficacy developed had met the valid criteria with a total average of 4.6, met the practical criteria with the implementation of the problem-based teaching materials used. has an average implementation of 81% in the good category, and meets the effective criteria, one of which is classical completeness reaching 85%, which has met the completeness criteria, namely 85% of students reach the KKM; 2) The improvement of students' critical thinking skills in the first and second trials can be seen in the average critical thinking ability in the posttest results of the first trial, which is 79.3 increasing to 84.7 in the second trial; 3) There was an increase in students' mathematical self-efficacy based on the average score of students' mathematical self-efficacy in the first trial of 3.21 while the average score of students' mathematical self-efficacy in the second trial was 3.45.

Keywords: development of problem-based learning tools, geogebra, critical thinking skills, self-efficacy.

DOI: 10.7176/JEP/13-16-10

Publication date:June 30^th 2022