Herlina, Jumi2013-02-122013-02-122013-02-12Nickmatil Verdani Fitrihttp://repository.unri.ac.id:80/handle/123456789/2069Upaya Meningkatkan Hasil Belajar Matematika Melalui Penerapan Model Pembelajaran Kooperatif Pendekatan TstsThe purpose of this classroom action research is that to improve the quality of learning mathematic proless especially at the tifth grade in SDN 002 Raja Bejamu. The classroom action research as done in the fifth grade. The students in classroom were 28 students, this research was done from January to December 2012, this action research was done in two circles. The first circle the researcher concern in the equipments of teaching learning process likes: sylabus, lesson plan, worksheet ect. The quantitative Data that the researcher got from the test, and qualitative Data, that the researcher got from observation sheets, At the second circle, the results pf the analysist were not only the motivation, interesting and students’ activities is progress but also the activities of the teacher. The table of freguensy Distribution show that the achievement of learning process is increase after use classroom Action Research. From this research the application of coorperative learning type TSTS can increase the guality of learning mathematic for the fifth grade of SDN 002 Raja Bejamu especially in learning “Geometri”en-USTwo Stay Two StrayLearning Outcomesstudent Paper Post Degree