Latar belakang penelitian ini adalah kebanyakan siswa kurang antusias dalam mengikuti proses belajar mengajar untuk pelajaran pendidikan dasar teknik mesin yang  sedang berlangsung, terutama  jika  guru didalam kelas menyampaikan suatu materi hanya  menggunakan  metode  konvensional seperti metode ceramah ketika membawakan suatu materi dan menempatkan siswa sebagai objek yang pasif. Siswa menjadi bosan dan pelajaran menjadi kurang efektif. Maka penelitian yang nantinya akan dilakukan adalah dengan menggunakan model pembelajaran problem posing untuk peningkatan kompetensi, aktivitas dan hasil belajar siswa.

Jenis penelitian ini merupakan penelitian tindakan kelas. Penelitian dilakukan di SMK Negeri 1 Jetis Mojokerto. Instrumen penelitian yang digunakan untuk mengumpulkan data meliputi : lembar pengamatan aktivitas kelas, lembar penilaian berfikir kritis, lembar tes meliputi kognitif, psikomotor, dan angket respon. Analisis data dilakukan untuk mengetahui hasil belajar siswa didalam kelas ketika melaksanakan kegiatan model pembelajaran problem posing untuk pelajaran pendidikan dasar teknik mesin.

Hasil penelitian menunjukkan bahwa penerapan model pembelajaran problem posing dapat meningkatkan aktivitas siswa dan hasil belajar pendidikan dasar teknik mesin siswa. Hal ini ditunjukkan dengan presentase aktivitas belajar siswa dikelas siklus i sebesar 71,38% kategori “baik “dan siklus ii sebesar 82,49% kategori “sangat baik”. Aktivitas siswa dibengkel siklus i sebesar 76,69% kategori “baik “dan siklus ii sebesar 80,19% kategori “sangat baik”. Hasil belajar kognitif dengan persentase siswa tuntas siklus i sebesar 57,21% kategori “sedang” dan siklus ii sebesar 79,27% kategori “baik”. Hasil belajar psikomotor dengan presentase siswa tuntas siklus i sebesar 40,90%  kategori “sedang” dan siklus ii sebesar 91,41% kategori “sangat baik”. Hasil peningkatan berfikir kritis siswa sebesar 0,66% kategori “sedang”. Hasil respon siswa selama pembelajaran sebesar 77,58% dengan kategori “baik”.

Kata kunci : Pembelajaran Problem Posing, Aktivitas Kelas, Berfikir Kritis Dan Hasil Belajar Siswa

The background of this study is that most students are less enthusiastic in participating in the teaching and learning process for basic mechanical engineering education, especially if the teacher in the class presents a material using only conventional methods such as lecture when delivering material and placing students as passive objects . Students become bored and lessons become less effective. So the research that will be carried out is to use the Problem Posing Learning Model to improve student competencies, activities and learning outcomes.

                This type of research is classroom action research. The study was conducted at SMK Negeri 1 Jetis Mojokerto. The research instruments used to collect data included: Class Activity Observation Sheet, Critical Thinking Assessment Sheet, Test Sheet covering Cognitive, Psychomotor, and Response Questionnaire. Data analysis was conducted to determine student learning outcomes in the classroom when carrying out the Problem Posing Learning Model activities for Mechanical Engineering Basic Education lessons.

                The results of the study showed that the application of the problem posing learning model could improve student activity and learning outcomes in basic engineering students' education. This is indicated by the percentage of student learning activities in the first cycle class of 71.38% in the "good" category and the second cycle of 82.49% in the "very good" category. Student activities in the first cycle workshop were 76.69% in the "good" category and the second cycle was 80.19% in the "very good" category. Cognitive learning outcomes with the percentage of students completing the first cycle of 57.21% in the category of "moderate" and the second cycle of 79.27% in the category of "good". Psychomotor learning outcomes with the percentage of students completing the first cycle of 40.90% in the category of "moderate" and the second cycle of 91.41% in the category of "very good". The results of students' critical thinking improvement were 0.66% in the "moderate" category. The results of student responses during learning amounted to 77.58% in the "good" category.

Keywords: Problem Posing Learning, Class Activities, Critical Thinking and Student Learning Outcomes.