ABSTRAKTujuan penelitian ini adalah untuk mengetahui peningkatan hasil belajarsiswa pada mata pelajaran Keselamatan, Kesehatan Kerja dan Lingkungan Hidup(K3LH) di kelas X Administrasi Perkantoran SMK Kristen 1 Surakarta tahunpelajaran 2014/2015 melalui penerapan model Contextual Teaching and Learning(CTL).Penelitian ini merupakan penelitian tindakan kelas (PTK). Penelitiandilaksanakan dalam 2 siklus penelitian, setiap siklus penelitian meliputi empattahapan, yaitu: perencanaan, pelaksanaan, pengamatan dan refleksi. Subjekpenelitian adalah siswa kelas X Administrasi Perkantoran SMK Kristen 1 Surakartayang berjumlah 29 siswa. Sumber data berasal dari guru, siswa dan dokumen. Teknikpengumpulan data adalah dengan wawancara, observasi, dokumentasi dan tes. ujivaliditas data menggunakan teknik triangulasi data dan triangulasi metode. Analisisdata menggunakan teknik analisis deskriptif komparatif dan analisis kritis. Prosedurpenelitian meliputi perencanaan, pelaksanaan, pengamatan dan refleksi.Hasil penelitian menunjukkan bahwa melalui penerapan model contextualteaching and learning (CTL) dapat meningkatkan hasil belajar siswa. Peningkatanhasil belajar sebesar 48,28 % dengan rincian pada pratindakan 31,03 % meningkatmenjadi 51,72 % pada siklus I dan meningkat menjadi 79,31 % pada siklus II. Nilairata-rata kelas juga mengalami peningkatan 18,48 dari pratindakan 67,93 meningkat3,1 pada siklus I meningkat menjadi 71,03 dan meningkat menjadi 86,41 pada siklusII. Simpulan penelitian ini adalah penerapan model pembelajaran contextualteaching and learning (CTL) dapat meningkatkan hasil belajar siswa pada matapelajaran Keselamatan, Kesehatan Kerja dan lingkungan hidup (K3LH) kelas XAdministrasi Perkantoran SMK Kristen 1 Surakarta.Kata Kunci : Contextual Teaching and Learning, Hasil BelajarABSTRACTThe objective of this research is to investigate the improvement of thelearning result in the subject matter of Application of Health, Occupational Healthand Environment of the students in Grade X of Office Administration Department ofChristian Vocational High School 1 of Surakarta in Academic Year 2014/2015through the application of the Contextual Teaching and Learning (CTL) model.This research used the classroom action research with two cycles. Each cycleconsisted of four phases, namely: planning, implementation, observation, andreflection. The subjects of research were the students as many as 29 in Grade X ofOffice Administration Department of the aforementioned school. The data sources ofresearch were a teacher, students, and documents. The data of research are collectedthrough in-depth interview, observation, documentation, and test. They werevalidated by using the data and method triangulations and analyzed by using thedescriptive comparative analytical techniques of analysis. The procedures of researchincluded planning, implementation, observation, and reflection.The results of research show that the application of the CTL model canimprove the students’ learning result as much as 48.28%. Prior to the treatment, thelearning result is 31.03 %. Following the treatment, it becomes 51.72 % in Cycle Iand 79.31 % in Cycle II respectively. The class average score also improves as muchas 18.48. Prior to the treatment, the average score is 67.93. Following the treatment itbecomes 71.03 in Cycle I and 86.41 in Cycle II respectively. Thus, the application ofthe CTL model improves the learning result in the subject matter of Application ofHealth, Occupational Health and Environment of the students in Grade X of OfficeAdministration Department of Christian Vocational High School 1 of Surakarta inAcademic Year 2014/2015.Keyword : Cotextual Teaching and Learning, Learning Result