PENERAPAN MODEL COOPERATIVE LEARNING TIPE TWO STAY TWO STRAY (TSTS) UNTUK MENINGKATKAN PRESTASI BELAJAR MATA PELAJARAN SOSIOLOGI PADA SISWA KELAS X 4 SMA NEGERI KEBAKKRAMAT TAHUN PELAJARAN 2013/2014 - Akbar, Muhammad Dafiq; ABSTRACT Muhammad Dafiq Akbar. K8410035. THE IMPLEMENTATION OF TWO STAY TWO STRAY (TSTS) TECHNIQUE IN COOPERATIVE LEARNING MODEL TO IMPROVE STUDENTS’ LEARNING ACHIEVEMENT ON SOCIOLOGY IN X 4 STUDENTS SMA NEGERI KEBAKKRAMAT SEMESTER 1 ACADEMIC YEAR 2013/2014. Thesis, Surakarta: Teacher Training and Education Faculty. Sebelas Maret University. April 2014. This research aims to improve students of X 4 SMA Negeri Kebakkramat Karanganyar learning achievement by the implementation of Two Stay Two Stray (TSTS) technique in cooperative learning model. This research is a Class Action Research (CAR) which is conducted in two cycles, with every cycle consists of planning, acting, observing, and reflecting. The subject of this research is the students of X 4 SMA Negeri Kebakkramat Karanganyar academic year 2013/2014. The data was taken from the teacher and the students. The techniques of collecting data are observation, test, interview, and documentation. The validity of the data use content validity, triangulation technique and expert opinion. The analysis of the data use descriptive analysis and critical technique. The result of the research shows that the implementation of Two Tray Two Stray (TSTS) technique in cooperative learning model can improve students’ learning achievement. The results showed that the application of cooperative learning model Two Stay Two Stray (TSTS) can improve student achievement start from pre-cycle to the first cycle, and from cycle I to cycle II. This is shown by the increased percentage of student activity that is the aspect of asking, answering, and argues that in the first cycle 77,77 % to 80,55 % in the second cycle, the aspects of student interaction within the group of 80,55 % in the first cycle and 83,33 % in the second cycle. The average value students in each cycle also increased , the pre-cycle average value of 64 increased to 74,58 in the first cycle and increased to 82,75 in the second cycle. The conclusions of this research is the application of cooperative learning model Two Stay Two Stray (TSTS) can improve student achievement class X 4 SMA Negeri Kebakkramat. Keywords: Class Action Research, Two Tray Two Stray (TSTS), Learning Achievement (SOSIALITAS: Jurnal Ilmiah Pendidikan Sosiologi Antropologi, 2014)