PENGARUH MODEL PROJECT BASED LEARNING DENGAN PENDEKATAN SAINTIFIK TERHADAP HASILBELAJAR SISWA PADA MATERI LAJU REAKSI

Abstract

Abstract: This study aims to determine the effect of the Project Based Learning (PjBL) model combined with a scientific approach on students’ learning outcomes and skills in the reaction rate topic. The study was conducted at SMA Negeri 1 Pangkatan, North Sumatra, involving two classes, namely XI IPA 1 as the experimental class and XI IPA 2 as the control class. The experimental class was taught using the Project Based Learning model with a scientific approach, while the control class was taught using conventional learning. Data were collected through objective tests and observation sheets. The test instrument initially consisted of 40 multiple-choice questions and was analyzed through validity, reliability, difficulty level, and discrimination power tests. The data were analyzed using a right-tailed t-test after conducting normality and homogeneity tests. The results showed that the average posttest score of the experimental class was 82.85, while the control class obtained an average score of 69.14. Hypothesis testing produced a t-count of 7.07, which was greater than the t-table value of 1.99 at a significance level of 0.05, indicating a significant difference in learning outcomes between the two classes. The effect size analysis resulted in a Cohen’s d value of 1.19, categorized as a large effect. In addition, the average student skill score in the experimental class was 80.57, compared with 71.24 in the control class. These findings indicate that the implementation of Project Based Learning with a scientific approach contributes to improved learning outcomes and student skills in learning the reaction rate topic.

Keywords: Project Based Learning, Scientific Approach, Learning Outcomes, Student

Skills, Reaction Rate.

Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh model Project Based Learning (PjBL) yang dipadukan dengan pendekatan saintifik terhadap hasil belajar dan keterampilan siswa pada materi laju reaksi. Penelitian dilaksanakan di SMA Negeri 1 Pangkatan, Sumatera Utara, dengan melibatkan dua kelas, yaitu kelas XI IPA 1 sebagai kelas eksperimen dan XI IPA 2 sebagai kelas kontrol. Kelas eksperimen diberikan pembelajaran menggunakan model Project Based Learning dengan pendekatan saintifik, sedangkan kelas kontrol menggunakan pembelajaran konvensional. Pengumpulan data dilakukan melalui instrumen tes dan lembar observasi. Instrumen tes terdiri dari 40 soal pilihan ganda yang terlebih dahulu dianalisis melalui uji validitas, reliabilitas, tingkat kesukaran, dan daya pembeda. Data penelitian dianalisis menggunakan uji-t pihak kanan setelah dilakukan uji normalitas dan homogenitas. Hasil penelitian menunjukkan bahwa rata-rata nilai posttest kelas eksperimen sebesar 82,85, sedangkan kelas kontrol sebesar 69,14. Hasil uji hipotesis memperoleh nilai t-hitung sebesar 7,07 yang lebih besar daripada t-tabel sebesar 1,99 pada taraf signifikansi 0,05, sehingga menunjukkan adanya perbedaan hasil belajar yang signifikan antara kedua kelas. Analisis effect size menghasilkan nilai Cohen’s d sebesar 1,19 yang termasuk dalam kategori besar. Selain itu, rata-rata nilai keterampilan siswa pada kelas eksperimen sebesar 80,57, sedangkan kelas kontrol sebesar 71,24. Hasil tersebut menunjukkan bahwa penerapan model Project Based Learning dengan pendekatan saintifik memberikan pengaruh terhadap peningkatan hasil belajar dan keterampilan siswa pada materi laju reaksi.

Kata kunci: Project Based Learning, Pendekatan Saintifik, Hasil Belajar, Keterampilan Siswa, Laju Reaksi.