The purpose of this research is to describe the ability of student’s social skills in class X MIPA SMAN 5 Pekanbaru through the application cooperative learning RTE techniques on topic momentum, impulse, and collision. The research method was Pre-experimental with the Intact-Group Comparison design. The research subject were students of class X MIPA 4 and X MIPA 2 that each consist of 36 stud…