PENERAPAN PROBLEM BASED LEARNING UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KRITIS PESERTA DIDIK PADA MATERI ZAT ADITIF

IMPLEMENTATION OF PROBLEM BASED LEARNING TO IMPROVE STUDENTS' CRITICAL THINKING SKILLS IN ADDITIVE MATERIALS

Penelitian ini bertujuan untuk mengetahui penerapan model problem based learning terhadap keterampilan berpikir kritis peserta didik pada materi zat aditif. Penelitian ini menggunakan pre-experimental design dengan desain one group pretest posttest. Subjek penelitian ini adalah 31 peserta didik kelas VIII B UPT SMPN 27  Gresik. Teknik pengumpulan data menggunakan pemberian pretest dan  posttest, observasi, dan pemberian angket. Data dianalisis secara deskriptif kuantitatif. Hasil perhitungan N-Gain menunjukkan bahwa penerapan model problem based learning terdapat peningkatan keterampilan berpikir kritis peserta didik pada materi zat aditif dengan kategori tinggi. Analisis deskriptif pada aktivitas pembelajaran dengan diberikan perlakuan memiliki hasil persentase tinggi. Simpulan yang diperoleh adalah pembelajaran IPA menggunakan model problem based learning pada materi zat aditif dapat meningkatkan kemampuan berpikir kritis peserta didik.

Kata Kunci: problem based learning, keterampilan berpikir kritis, zat aditif

This research aimed to determine the problem based learning implementation model toward students' critical thinking skills on the material of additives. This research used pre-experimental design with one group pretest posttest. The subjects’ in this research were 31 students’ of VIII B class in Public Junior High School 27 Gresik. Data collection technique of pretest and posttest, observation, and provision of questionnaires. The data was analyzed quantitatively. The results of the N-Gain calculation showed that the application of problem based learning model increased students' critical thinking skills on the additives material with a high category. Descriptive analysis on learning activities by the given treatment had a high percentage result. The conclusion obtained was science learning using a problem based learning model on the additives material can improve students’ critical thinking skills.

Keywords: problem based learning, critical thinking skill,  Additives