Sri Andayani, Muqit Virdaus
Developing Web-Based Instruction (WBI) requires new perspectives on the learning process and how students acquire knowledge, particularly if it is related to how to improve students' critical thinking (CT). For this goal, this study was conducted. We employed the ADDIE procedure to develop the WBI. Still, this paper focuses on discussing the design and development of a WBI on plane geometry that incorporates steps to improve students' CT along with its findings. The results show a strategic approach for enhancing WBI through the integration of worksheets and evaluation menus. In addition, the deliberate highlighting of five CT indicators (abstraction, generalization, decomposition, algorithms, and debugging) within each activity fosters student familiarity with the concept of augmenting CT skills. After implementing WBI, the assessment results for 32 students revealed the following percentages of students who successfully completed specific CT indicators: Abstraction (82.82%), Generalization (93.75%), Decomposition (67.19%), Algorithms (64.06%), and Debugging (89.47%). © 2025 Author(s).
Department of Mathematics Education, Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
