Penerapan Media Manipulatif Berbasis Bahan Bekas melalui Pembelajaran Kontekstual dalam Meningkatkan Pemahaman Konsep Satuan Berat Tidak Baku Siswa Kelas I Sekolah Dasar

Alya Syifa Devani (Universitas Riau)
Santi Santi (Universitas Riau)
Jesi Alexander Alim (Universitas Riau)
Cici Oktaviani (Universitas Riau)

Pentagon: Jurnal Matematika dan Ilmu Pengetahuan Alam
Vol. 4 No. 3 (2026): September : Pentagon : Jurnal Matematika dan Ilmu Pengetahuan Alam

The mathematical concepts taught in elementary school are generally abstract, including the concept of measuring non-standard weight units. Students need to gain real learning experiences to understand those mathematical concepts. Manipulative media based on recycled materials, such as "scales," are an alternative that allows students to directly interact with learning objects through activities of observing, comparing, and discovering concepts to solve mathematical problems. This research uses the Classroom Action Research (CAR) method with the Kemmis and McTaggart model, which consists of the stages of planning, action, observation, and reflection. The purpose of this research is to analyze the use of manipulative media in understanding the concept of weight in mathematics. The research subjects consisted of 23 first-grade students in elementary school. Based on the results of the descriptive analysis, the average score of the students increased by 34.79 points, from 32.17 in the pretest to 66.96 in the posttest. The increase indicates a change in conceptual understanding after the implementation of manipulative media based on recycled materials.