8^th Grade Student's Collaboration in Circle Material by Using System Lesson Study for Learning Community

This study aims to describe the collaboration of students through lesson study for learning community in circle lesson. The data is obtained through the result of the observation and documentation of photos and videos. The subject of this study is second-grade students of Junior High Scholl at 1 Palembang. This is a descriptive qualitative study with PMRI approach. The learning process is done by doing a Jumping Task where students solve the problems individually and are encouraged to ask other students when difficulties are found. The use of lesson study for learning community has brought a positive impact for second-grade students like showing up a sense of care, decreasing the rise of competitiveness and creating collaboration among students in the learning process.