Pengembangan Bahan Ajar Berbasis Masalah Kontekstual pada Materi Sistem Persamaan Linier Tiga Variabel untuk Meningkatkan Kecakapan Pemecahan Masalah Matematis Siswa Fase E

For the objective of this development investigation, a four-dimensional model was implemented. The objective of this research is to enhance the mathematical problem-solving capabilities of students during Phase E by developing contextual problem-based instructional resources on three-variable linear equation systems. These materials will be practical, effective, and valid. Validation sheets, student response questionnaire sheets, and mathematical problem-solving abilities assessments (KPMM) are the instruments employed for this investigation. The findings of the questionnaire for student replies to teaching materials are 79.22% with a practical category, and there are no additional adjustments for the teaching materials. The average percentage of student validation results for teaching materials is 92.34% with a highly valid category. Students who studied utilizing produced teaching materials had better scores on the KPMM test (87.33), compared to students who studied without utilizing developed teaching materials (77.53). Increasing students' knowledge, skills, and abilities in three-variable linear equation systems may be accomplished through the construction of contextual problem-based teaching materials, according to data on validity, practicability, and effectiveness analysis.