ABSTRAKTujuan penelitian ini adalah untuk meningkatkan kemampuan berpikir kritis dan hasil belajar siswa kelas X Pemasaran pada mata pelajaran Konfirmasi Keputusan Pelanggan di SMK Batik 1 Surakarta tahun pelajaran 2014/2015 melalui penerapan model pembelajaran kooperatif tipe Think Pair Share.Penelitian ini merupakan penelitian tindakan kelas (PTK) yang dilakukan sebanyak dua siklus. Setiap siklus terdapat 4 tahap yaitu: (1) perencanaan tindakan; (2) pelaksanaan tindakan; (3) pengamatan; (4) refleksi terhadap tindakan. Setiap siklus terdapat 4 kali pertemuan dengan setiap pertemuan berlangsung sebanyak 2 x 45 menit.Berdasarkan hasil penelitian, dapat disimpulkan bahwa model pembelajaran kooperatif tipe Think Pair Share dapat meningkatkan kemampuan berpikir kritis dan hasil belajar siswa kelas X Pemasaran SMK Batik 1 Surakarta tahun pelajaran 2014/2015. Hal tersebut terlihat dari kemampuan berpikir kritis siswa pada aspek memfokuskan masalah meningkat sebesar 29,03% (siklus I sebesar 64,52% dan siklus II 93,55%), pada aspek mempertimbangkan sumber atau teori meningkat sebesar 32,26% (siklus I 58,06% dan siklus II 90,32%), pada aspek mengidentifikasi masalah meningkat sebesar 35,49% (siklus I 58,06% dan siklus II 93,55%), pada aspek memberikan alternatif untuk pemecahan masalah meningkat sebesar 32,25% (siklus I 54,84% dan siklus II 87,09%), pada aspek menjelaskan alternatif pemecahan masalah meningkat sebesar 32,26% (siklus I 51,61% dan siklus II 83,87%), dan pada aspek membuat kesimpulan sederhana meningkat sebesar 22,58% (siklus I 74,19% dan siklus II 96,77%). Sebelum diterapkan model pembelajaran Think Pair Share nilai rata-rata kelas adalah 75,23 dengan presentase ketuntasan hasil belajar sebesar 47%. Pada siklus I nilai rata-rata kelas sebesar 77 dengan presentase ketuntasan hasil belajar sebesar 74,2%, sedangkan siklus II nilai rata-rata kelas sebesar 83,38 dengan presentase ketuntasan hasil belajar sebesar 90,32%. Dengan demikian dapat disimpulkan bahwa dengan penerapan model pembelajaran Think Pair Share dapat meningkatkan kemampuan berpikir kritis dan hasil belajar siswa pada mata pelajaran Konfirmasi Keputusan Pelanggan.Kata kunci: Think Pair Share, kemampuan berpikir kritis dan hasil belajar Konfirmasi Keputusan Pelanggan.ABSTRACTThe objective of this research is to improve the critical thinking ability and the learning achievement in Consumer-Based Decision Confirmation of the students in Grade X of Marketing Department of Vocational High School Batik 1 of Surakarta in Academic Year 2014/2015 through the application of the Cooperative Learning Model of the TPS type.This research used the classroom action research (CAR) with two cycles. Each cycle consisted of four phases, namely: planning, action, observation, and reflection. Each cycle had four sessions, and each lasted for 2 x 45 minutes. The achievement of research shows that the cooperative learning model of the TPS type could improve the critical thinking ability and the learning achievement in the Consumer-Based Decision Confirmation subject matter of the students in Grade X of Marketing Department of Vocational High School Batik 1 of Surakarta in Academic Year as shown by the following: The critical thinking ability on the aspect of Focusing Problems increased as much as 29.03% (In Cycle I it was 64.52%, and in Cycle II it became 93.55%); the critical thinking ability on the aspect of Considering Sources or Theories increased as much as 32.26% (In Cycle I it was 58.06%, and in Cycle II it became 90.32%); the critical thinking ability on the aspect of Identifying Problems increased as much as 35.49% (In Cycle I it was 58.06%, and in Cycle II it became 93.55%); the critical thinking ability on the aspect of Giving Alternatives to Solve Problems increased as much as 32.25% (in Cycle I it was 54.84%, and in Cycle II it became 87.09%); the critical thinking ability on the aspect of Explaining Alternatives to Solve Problems increased as much as 32.26% (in Cycle I it was 51.61%, and in Cycle II it became 83.87%); and the critical thinking ability on the aspect of Drawing Conclusions increased as much as 22.58% ( in Cycle I it was 74.19%, and in Cycle II it became 96.77%). Furthermore, prior to the application of the cooperative learning model of the TPS type, class average score was 75.23 with learning completeness of 47%. Following the treatment, the score average score became 77 with the learning completeness of 74.2% in Cycle I and 83.38 with the learning completeness of 90.32% in Cycle II. Thus, the application of the cooperative learning model of the TPS type could improve the critical thinking ability and the learning achievement in the Consumer-Based Decision Confirmation subject matter.Keywords: Think Pair Share, critical thinking ability, learning achievement in the Consumer-Based Decision Confirmation subject matter