The Effect of Discovery Learning Model Assisted by PhET Media on The Critical Thinking Ability of Class X High School Students

Abstract

This study aims to determine the effect of the discovery learning model assisted by PhET media on Alternative Energy material on the critical thinking skills of class X high school students in Cirebon city of 2024/2025 year. This type of research is a kuasi experiment. The research sample was an experimental class of 34 students and control class of 32 students with purposive sampling technique. The instrument was a student critical thinking skills test with the form of essay questions and has been validated by experts. In addition, based on the results of statistical tests, the instrument was declared valid and reliable with a value of 0.676. The average posttest score of the experimental class was 87 and the control class posttest was 81. The prerequisite test results stated that the samples were normally distributed and homogeneous. In addition, an independent t-test was conducted with a result of 0.002. These results indicate that there is a significant effect of the discovery learning model assisted by PhET media on Alternative Energy material for X grade high school students.Penelitian ini bertujuan untuk mengetahui pengaruh model discovery learning berbantuan media PhET pada materi Energi Alternatif terhadap kemampuan berpikir kritis siswa kelas X SMA di kota Cirebon tahun pelajaran 2024/2025. Jenis penelitian ini adalah kuasi eksperimen. Sampel penelitian berupa kelas eksperimen berjumlah 34 siswa dan kelas kontrol berjumlah 32 siswa dengan teknik purposive sampling. Instrumen yang digunakan adalah tes keterampilan berpikir kritis siswa dengan bentuk soal esai dan telah divalidasi pakar. Selain itu, berdasarkan hasil uji statistik, instrumen dinyatakan valid dan reliabel dengan nilai 0,676. Didapatkan rata-rata nilai posttest kelas eksperimen 87 dan posttest kelas kontrol sebesar 81. Hasil uji prasyarat menyatakan sampel terdistribusi normal dan homogen. Selain itu dilakukan uji-t independen dengan hasil 0,002. Hasil tersebut menunjukkan terdapat pengaruh yang signifikan dari model discovery learning berbantuan media PhET pada materi Energi Alternatif siswa kelas X SMA.