Nuriana Rachmani Dewi, Erika Dwi Anggraeni, Adi Satrio Ardiansyah
Learning tools such as syllabus, lesson plans, teaching material as superior product, student activity sheets, and GeoGebra learning media through the ICT-assisted Preprospec learning model are innovations in mathematics teaching and learning to improve students' ability to solve mathematical problem. This research applied Research and Development (R&D) method with 4D models. It had three steps, namely define, design, and develop. The results showed that all learning instruments covering a syllabus, lesson plans, teaching material, student worksheets, and GeoGebra learning media on polyhedron material were very suitable to be used in learning activities with the feasibility percentages of 95.37%;94.70%;91.77%;92.71%; and 94.79%. In terms of readability, after the teaching material was tested using Cochran Test, it gained value Q=13,67 <χ(a;k-1)2 = 16,919 which meant the teaching material was easily understood by students. In addition, the test value of N-Gain was 0.586 or moderate criterion which proved that the learning instruments developed were able to improve the ability to solve mathematical problems by students. © 2023 Author(s).
Department of Mathematics, Universitas Negeri Semarang, Semarang, Indonesia
