ABSTRACT
This study aims to develop a practical constructivism-based workbook for the teaching of argument and deduction methods at STKIP PGRI, West Sumatera, a teacher-training college. These methods are taught in the Basic Introduction to Mathematics course in the second semester. It uses a general model of Plomp’s research design, namely preliminary research, prototyping phase, and assessment phase. The preliminary research phase shows that students need teaching materials that can build a conceptual understanding, called a constructivism-based workbook. The prototyping phase was conducted as a one-to-one evaluation practicality test given to three students and a small group evaluation was conducted on nine students who had already taken the Basic Introduction to Mathematics course and each of whom represented high, medium, or low ability. The workbook is validated according to expert reviews. Data of the one-to-one test and small group evaluation were collected from interviews and a questionnaire. Results show that the workbook is practical based on the time needed, ease of use, and benefits of use.
