Open-ended mathematics module to improve students’ higher order thinking skill

Abstract

Abstract Higher order thinking skill (HOTS) is a more complex thinking skill using cognitive domains in C4 (analyzing), C5 (evaluating), and C6 (creating). This study aims to develop an initial mathematical module based on a valid prototype of open-ended mathematics module to help students to improve HOTS on the material of linear equation system in two variables. An open-ended approach is one of the learning approaches that can be used to increase HOTS students. This type of study was research and development (R&D). There are three stages of development research, namely (1) preliminary study consisting of 3 steps, namely initial research, analysis of the needs, and literature study, (2) product development consisting of three steps namely planning, initial product development, product testing and revision, (3) product efficacy testing, which is the stage of comparing modules developed with existing products. This research was conducted on the eighth-grade students of a public junior high school in Surakarta. The results obtained from this study was the average results of each initial module validation by media experts, material experts, and language experts are 3.27, 3.21, and 3.77. The product prototype is valid so it can be used to measure students’ HOTS.