UTILIZATION OF THE MASTERY LEARNING MODEL TO ENHANCE COMPREHENSION OF SUBTRACTION MATERIAL FOR SECOND GRADE PRIMARY SCHOOL STUDENTS

Abstract

Primary education provides knowledge and skills, fosters the basic attitudes needed in society, and prepares students for secondary education. Mathematics lessons need to be conveyed and introduced to students. Students in school can be used as a first step for teachers to improve their abilities and skills in logical, analytical, systematic, critical, and creative thinking. Mastery Learning is a learning approach that is guided by completeness. The concept of complete learning is a process to ensure that all learning at school is completely mastered. Observation results show that students still have difficulty solving why they have to scribble, why they have to borrow tens, and so on. This is where students need to be instilled with the basic concept of subtraction. Classroom action research was conducted at SD Ulil Albab Kepanjen with 14 students who discussed subtraction material. The techniques used for this research were observation methods and test methods. In the final test activities, the average percentage of student learning outcomes reached 65% because of the 14 students; 9 got scores below the KKM, namely 80. Meanwhile, in cycle 2, the final test results increased, reaching an average of 90%.