Peningkatan Kemampuan Mengukur Berat dan Waktu Melalui Media Kotak Timbang Waktu pada Siswa Kelas II SDN Kebonsari 2 Malang

Abstract

This study, a Classroom Action Research (CAR), aimed to improve students' ability to measure weight and time using non-standard units through the use of a concrete medium, a weighing box. This study was conducted in two cycles with 28 second-grade students at SDN Kebonsari 2 Malang, consisting of 13 boys and 15 girls. Each cycle consisted of two meetings, each with planning, implementation, observation, and reflection. Data collection techniques included observation of student activities, learning achievement tests, documentation, and teacher and student reflections. The results showed that the use of the weighing box significantly improved students' ability to measure weight and time. The average class grade increased from 80.71 in cycle I to 90.71 in cycle II, while the completion rate increased from 64.28% to 85.71%. This medium facilitated active, concrete, and enjoyable learning for students. Students not only understood the concepts more easily but also became more enthusiastic, engaged, and independent in the learning process. This research shows that the use of concrete media is highly effective in improving the outcomes and quality of mathematics learning in lower grades.