ABSTRAKTujuan penelitian ini adalah untuk meningkatkan keaktifan belajarakuntansi melalui pembelajaran Problem Based Learning dan Think Pair Sharedengan media monopoli pada kelas X AK-2 SMK Negeri 6 Surakarta.Penelitian ini merupakan Penelitian Tindakan Kelas (PTK) dengansubjek siswa kelas X AK-2 SMK Negeri 6 Surakarta yang berjumlah 32 siswa.Penelitian ini dilaksanakan dengan tiga siklus, masing-masing siklus terdiri dariempat tahap yaitu (a) perencanaan tindakan, (b) pelaksanaan tindakan, (c)observasi dan interpretasi, dan (d) analisis dan refleksi. Teknik pengumpulan datadilakukan dengan wawancara, observasi, tes, dan dokumentasi. Sumber datayang dilakukan berasal dari guru, siswa, aktivitas pembelajaran, dan hasil tessiswa.Validitas instrumen yang digunakan adalah validitas isi, sedangkanvaliditas data menggunakan teknik triangulasi metode dan penyidik. Analisisdata menggunakan analisis data kuantitatif dan analisis data kualitatif.Berdasarkan penelitian yang telah dilakukan, dapat disimpulkan bahwapenerapan pembelajaran Problem Based Learning dan Think Pair Share denganmedia monopoli dapat meningkatkan keaktifan belajar akuntansi siswa. Hal iniditunjukkan dengan presentase keaktifan belajar siswa yang mengalamikenaikan dari pratindakan sampai siklus III. Pada siklus I keaktifan mengalamikenaikan sebesar 14,50% yaitu dari 50% menjadi 64,50%, pada siklus II keaktifanmengalami kenaikan sebesar 9,125%, yaitu dari 64,50% menjadi 73,625%, danpada siklus III juga mengalami kenaikan keaktifan belajar sebesar 8,755%, yaitudari 73,625% menjadi 82,38%. Selain itu, nilai tes hasil belajar siswa mengalamipeningkatan dari pratindakan sampai siklus III. Pada siklus I tes hasil belajarsiswa mengalami kenaikan sebesar 12,5%, yaitu dari 34,375% menjadi 46,875%,pada siklus II mengalami kenaikan sebesar 12,5%, yaitu dari 46,875% menjadi59,375%, dan pada siklus III juga mengalami kenaikan sebesar 18,6%, yaitu dari59,375% menjadi 78%. Demikian, dapat disimpulkan bahwa penerapanpembelajaran Problem Based Learning dan Think Pair Share dengan mediamonopoli dapat meningkatkan keaktifan belajar akuntansi pada kelas X AK-2SMK Negeri 6 Surakarta tahun pelajaran 2014/2015.Kata Kunci: Keaktifan Belajar, hasil belajar, Problem Based Learning,Think Pair Share, monopolIABSTRACTThe objective of this research is to improve the Accounting learningactiveness through the application of the problem based learning (PBL) and thinkpair share (TPS) models with monopoly media of the students in grade X AK-2of State Vocational High School 6 Of Surakarta in Academic Year 2014/2015.This research used the classroom action research with three cycles. Eachcycle consisted of four phases i.e (a) planning, (b) implementation, (c) observationand interpreting, and (d) analyzing and refletion. The subjects of the researchconsisted of 32 students of the aforementioned school. The data of the researchwere collected trought in-depth interview, observation, test, and documentation.The sources of the research were teacher, students, learning activities and testresult of the students. The instrument of research were validited with the contentvalidity, and the data were validited by using the method triangulation andinvestigator triangulation. The data were analyzed by using the quantitative andqualitative analyses.The results of research are shows that the application of the PBL andTPS with monopoly media can improve the students’Accounting learningachievement as indicated by the increased percentage of the students’Accountingactiveness in pre-treatment through cycle III. In cycle, the students’Accountingachievement increases as much as 14,50% from 50% to 64,50%. In cycle IIincreases as much 9,125% from 64,50% to 73,625%. In cycle III, it increases asmuch 8,755% from 73,625% to 82,38%. In addition, the students’ test scoreaverage also improves from the pre-treatment through cycle III. In cycle I, thestudents’ test score average increases as much as 125% from 34,375% to46,875%. In cycle II it increases as much as 12,5% from 46,875% to 59,375%.Finally, in cycle III, it increases as much as 18,6% from 59,375%to 78%. Thus,the application of the problem based learning and think pair share models withmonoply media can improve the Accounting learning activeness of the students inGrade X AK-2 of State Vocational High School 6 Of Surakarta in Academic Year2014/2015.Keywords: Learning activeness, learning result, Problem Based Learning, Think PairShare, monopoly