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This article is based on the low ability of students to solve mathematical problems, and the weakness of teachers in preparing lesson plans and LAS. This article aims to analyze the results of the validation of mathematical learning tools based on a problem-based learning model on the material of flat-sided shapes. The model used in this development is the ADDIE development models but it is limited to four stages, namely the analysis, design, development and implementation stages. The research instrument used in this article was a validation sheet (validity aspect in the form of a questionnaire), two lecturers and a math teacher assessment sheets and an assessment sheet by twelve students (practicality aspect in the form of a questionnaire). The data analysis used in this article is a descriptive analysis using a Likert scale score. From the analysis, it is concluded that this research produces mathematical learning tools based on a problem based learning model on the valid and practical material of flat-sided shapes.

jurnal cendekia : jurnal pendidikan matematika/jurnal cendekia

Pengembangan Perangkat Pembelajaran Matematika Berbasis Model Problem Based Learning untuk Memfasilitasi Kemampuan Pemecahan Masalah Siswa Kelas VIII SMP/MTs