ABSTRAK
Tujuan penelitian ini adalah (1) Untuk mengetahui seberapa besar peningkatan hasil belajar siswa dengan penggunaan model pembelajaran kooperatif Tipe Kepala Bernomor Terstruktur pada mata pelajaran Mekanika Teknik kelas X Teknik Sipil SMK Negeri 5 Surakarta tahun ajaran 2015/2016, (2) Untuk mengetahui seberapa besar peningkatan keaktifan siswa dengan penggunaan model pembelajaran kooperatif tipe Kepala Bernomor Terstruktur pada mata pelajaran Mekanika Teknik kelas X Teknik Sipil SMK Negeri 5 Surakarta tahun ajaran 2015/2016. Penelitian ini merupakan penelitian tindakan kelas (PTK) yang dilakukan dalam dua siklus. Teknik analisis data yang digunakan dalam penelitian ini adalah analisis kualitatif. Hasil penelitian menunjukkan bahwa: 1) penerapan model pembelajaran kooperatif tipe kepala bernomor terstruktur dapat meningkatkan hasil belajar siswa. Peningkatan hasil belajar siswa dapat dilihat dari persentase ketuntasan hasil belajar ranah kognitif, ranah afektif dan ranah psikomotorik. Persentase ketuntasan hasil belajar ranah kognitif pra siklus sebesar 68,75%, siklus I sebesar 71,875% dan siklus II sebesar 81,25%. Persentase ketuntasan hasil belajar ranah afektif pra siklus sebesar 25%, siklus I sebesar 62,5% dan siklus II sebesar 81,25%. Persentase ketuntasan hasil belajar ranah psikomotorik pra siklus sebesar 28,125%, siklus I sebesar 71,875% dan siklus II sebesar 84,375%; 2) penerapan model pembelajaran kooperatif tipe kepala bernomor terstruktur dapat meningkatkan keaktifan siswa. Peningkatan keaktifan siswa dapat dilihat dari kenaikan pencapaian aktivitas siswa. Berdasarkan hasil tersebut penerapan model pembelajaran kooperatif tipe kepala bernomor terstruktur dapat meningkatkan hasil belajar dan keaktifan siswa kelas X Teknik Sipil C (X TSC) SMK Negeri 5 Surakarta pada mata pelajaran Mekanika Teknik. Kata kunci : Model Pembelajaran, Kepala Bernomor Terstruktur, Hasil Belajar, Mekanika Teknik  

ABSTRACT
The purpose of this research was to 1) improve the increase of students’ learning achievement by using numbered head structured cooperative learning model in mechanic technique subject at the tenth grade civil engineering of SMK N 5 Surakarta in the 2015/2016 year academic, 2) improve the increase of students’ activeness by using numbered head structured cooperative learning model in mechanic technique subject at the tent grade civil engineering of SMK N 5 Surakarta in the 2015/2016 year academic. This is Classroom Action Research (CAR) was conducted in two cycles. The technique of data analysis was qualitative. The result of the research showed that: 1) the implementation model of cooperative learning by using numbered head structured can improve students’ learning achievement. The improvement of students’ learning achivement can be seen from the percentage learning result by cognitive, affective, and psychomotor. The percentage of pre-cycle cognitive learning result was 68,75%, the first cycle was 71,875% and the second cycle was 81,25%. Affective learning result pre-cycle 25%, the first cycle was 62,5% and the second cycle was 81,25%. Psychomotor learning result pre-cycle was 28,125%, the first cycle was 71,875% and the second cycle was 84,375%. 2) The implementation model of cooperative learning by using numbered head structured can improve students’ activeness. Improvement of students’ activeness can be seen from the increase of students’ activity. The based on these result was the implementation of cooperative learning model by using numbered head structured can improve achievement and activeness tenth grade civil engineering students of SMK N 5 Surakarta in mechanic technique subject. Keyword : Learning Model, Numbered Head Structured, Achievement, Mechanic Technique