Tujuan penelitian ini adalah untuk meningkatkan keaktifan dan prestasi belajar siswa kelas X Otomotif 1 SMK PGRI 1 Surakarta pada mata diklat Otomotif Dasar tahun pelajaran 2012/2013 melalui penerapan model pembelajaran kooperatif tipe Think Pair Share (TPS).
Penelitian ini merupakan penelitian tindakan kelas (Classroom Action Research). Penelitian dilaksanakan dengan dua siklus dengan setiap siklus terdiri atas  empat tahapan, yaitu: (1) perencanaan; (2) pelaksanaan; (3) observasi; (4) refleksi. Subjek penelitian adalah seluruh siswa kelas X Otomotif 1 SMK PGRI 1 Surakarta pada mata diklat Otomotif Dasar tahun pelajaran 2012/2013 sebanyak 31 siswa. Penelitian ini dilaksanakan dengan kolaborasi antara peneliti, guru kelas, dan melibatkan partisipasi siswa. Teknik pengumpulan data menggunakan lembar observasi, wawancara, tes, dan dokumentasi. Sumber data berasal dari guru, siswa, proses pembelajaran, dan dokumen. Validitas data dibuktikan dengan member check, triangulasi, audit trail, expert opinion, dan key respondents review. Analisis data menggunakan teknik analisis statistik deskriptif komparatif dan analisis kritis. Prosedur penelitian adalah model spiral yang saling berkaitan.
Hasil penelitian menunjukkan bahwa penerapan model pembelajaran kooperatif tipe Think Pair Share (TPS) dapat meningkatkan keaktifan dan prestasi belajar siswa. Keaktifan siswa pada pratindakan hanya 14% dan prestasi siswa rendah yaitu 45% siswa tidak lulus. Peningkatan terjadi pada siklus I. Keaktifan siswa dari pratindakan  14% menjadi 59% pada siklus I. Prestasi siswa dari  55% lulus menjadi 68% lulus pada siklus I. Pelaksanaan siklus II keaktifan siswa meningkat 17%, dari 59% pada siklus I menjadi 76% pada siklus II, dan prestasi belajar siswa meningkat 16% yaitu 84 % siswa lulus.
Berdasarkan hasil penelitian dapat disimpulkan bahwa: penerapan model pembelajaran kooperatif tipe Think Pair Share (TPS) dapat meningkatkan keaktifan dan prestasi belajar siswa pada mata diklat Otomotif Dasar.

The purpose of this research is to increase the activeness and the students’ achievement of X grader Automotive 1 of SMK PGRI 1 Surakarta on Basic Automative subject in the Academic Year 2012/2013 through the application of cooperative learning of Think Pair Share (TPS) type.
    This research was a kind of Classroom Action Research. The research was done with two cycles which each cycle consisted of 4 phases, they were: (1) planning; (2) conducting; (3) observing; (4) reflecting. The research subjects were X Graders Automotive 1 of SMK PGRI 1 Surakarta on Basic Automotive subject in the academic year 2012/2013 as many 31 students. This study was done through   collaboration among the researcher, room teacher, and involves students’ participation. Collecting data technique used observation sheet, interview, test, and documentation. Data sources came from donation from teachers, students, learning process, and documents. Validity and data were proven with member check, triangulation, audit trail, expert opinion, and key respondents review. Data analysis used comparative descriptive analytical technique and critical analytics. Observing research used spiral model which research procedure was related each other.
Result of research shows that the application of cooperative learning model of Think Pair Share (TPS) type can increase the activeness and students’ achievement. The students’ activeness at pre cycle is 14% and students’ achievement is very low, 45% of students failed. The increasing is on cycle I. The activeness of pre cycle is 14% to 59% at cycle I. Students’ achievement is from 55% passed to 68% passed on cycle I. On cycles II, the activeness increases 17%, from 59% on cycle I to76% on cycles II,and students’ achievement increases 16%, that is 84% students passed.