Development Of The SPLTV Geogebra Book In Mathematics Learning To Improve Students' Critical Thinking Ability

Abstract

This research aims to determine the process of developing the Geogebra Book SPLTV mathematics learning media to improve students' critical thinking skills. The research method used in this research is Research and Development with the ADDIE model, namely Analysis, Design, Development, Implementation and Evaluation. The research results refer to each stage of ADDIE. In the analysis stage, researchers analyzed the material and students' needs to find out the problems and determine appropriate media development solutions to overcome these problems. In the Design Stage, researchers design development products from learning outcomes to linking material to critical thinking indicators. Development stage, researchers start designing the cover, creating the contents of the geogebra book and ending with the media that will be developed. Next, the media is validated by media experts and material experts. The assessment from media experts received a percentage of 83.6%. The assessment from material experts received a percentage of 85.2% so that the media was declared ready to be used in the Implementation stage. In the Implementation Stage, the media is used in the learning process and then its suitability is measured through a student response questionnaire, getting a percentage of 85.78%, which means the media is suitable for use. The Evaluation stage measured the effectiveness of Geogebra media, getting an N-Gain score of 1.17157 and learning completeness exceeding 80% so that the media was considered effective in improving students' critical thinking skills.