Efektivitas Penggunaan Media Neraca Bilangan Untuk Meningkatkan Pemahaman Konsep Operasi Perkalian Bagi Siswa Tunagrahita Ringan

This study aims to prove that number balance media can improve understanding of the concept of multiplication
operations with a maximum result of 10 in SLBN 02 Padang. This type of experimental research with the Single
Subject Research approach uses the A-B-A design. Where A shows the baseline condition of the student's ability
before being given intervention, then B is the period of intervention given to students, and A is the condition of
the student after receiving the intervention called (A2). Overall the results of this study found that using a
number balance media can improve the ability to understand the concept of multiplication operations with a
maximum result of 10 for mild mentally retarded students with the results obtained in the A1 condition three
times before using the number balance media are 17, 22, 22. Furthermore, the authors conducted ten treatments
using a number balance media (B), the results obtained increased to 33, 44, 50, 50, 61, 67, 78, 83, 94, 94. Even
students were able to obtain self-evaluation results ( A2) without using a number balance with three meetings
the results obtained are 94, 100, 100. The results of this study prove that the use of some balance media can
improve understanding of the concept of multiplication operations with a maximum result of 10 for mild
mentally retarded students.