Main Article Content
This study ascertained the levels of critical thinking and problem-solving skills of randomly selected 466 Grade 10 students and the least mastered critical thinking and problem-solving skills. The Analysis, Design, Development, Implementation, and Evaluation (ADDIE) model was utilized in the skills assessments, designing the instructional materials, developing the instructional materials through a seminar-workshop, implementing the instructional materials, and evaluating the instructional materials. In the analysis phase, results show that the students' skills were initially in the "beginning" and "developing" stages, respectively, and the content areas where students had the least mastered skills were quadratic equations and inequalities and quadratic functions. The instructional materials were designed through a problem-based learning approach, then developed by teachers through a seminar-workshop. After the development of the instructional materials, it was then pilot tested in different schools. The last phase is the evaluation of another set of teachers, result of the evaluation shows that the modules enhanced the students’ critical thinking and problem-solving skills and were rated “very good”.