UPAYA MENINGKATKAN KEMAMPUAN PEMAHAMAN KONSEP MATEMATIS SISWA PADA MATERI BENTUK ALJABAR MELALUI PENDEKATAN CONTEXTUAL TEACHING AND LEARNING BERBANTU ALAT PERAGA DI KELAS VII-7 SMP NEGERI 18 TANGERANG SELATAN

Abstract

This research was conducted at 18 junior high schools South Tangerang city year of study 2019/2020 in August-October 2019. The subject of this research is a student in VII-7 grade at 18 junior High School south of Tangerang city, there are 38 students. The learning method used in this research is action research with the model of Kurt Lewin, there are four stages of planning, implementation, observation and reflection consisting of two cycles. Based on the results of this research, the average value of students ability to understand the mathematical concept before action is 45.48 with the percentage of achievement KKM 15.79%. After an action acquired the average value of students ability to understand the mathematical concept on the first cycle is 66.91 with a percentage of achievement KKM 52.63% and it doesn't reach the target yet. After making repairs by improving the activity of students during the process of learning activities, then obtain an average of students ability to understand a mathematical concept in the second cycle is 76.31 with a percentage of Achievement 81.58%. The results concluded that through a learning approach Contextual Teaching and Learning can improve the student's ability to understand the mathematical concept in class VII-7 at 18 junior high schools south of Tangerang city.