Teaching materials design based on project learning to improve the students' mathematical understanding

Project-based learning requires students to explore and combine their knowledge and skills to solve problems in groups for a certain time. Through the development of project-based teaching materials, students learn to apply theory in an activity that produces experience, so that learning is expected to be more meaningful and improve the students' mathematical understanding. This study aimed to determine the validity, practicality, and effectiveness of teaching materials based on project learning to improve the students' mathematical understanding, especially on the applied statistics course. The stages of this study consisted of design and development, product validation by 3 experts, limited testing of 10 students, and field testing of 97 students. The results show that the teaching material has fulfilled the valid, practical, and effective aspects used in learning because it increases the ability of students' mathematical understanding by 15.8%.