Implementasi Model Pembelajaran Project Based Learning (PjBL) Terintegrasi STEM dalam Meningkatkan Kemampuan Berpikir Kritis Kimia Siswa SMA Angkasa 1 Jakarta

Sibuea, Tamara Novianty (2024) Implementasi Model Pembelajaran Project Based Learning (PjBL) Terintegrasi STEM dalam Meningkatkan Kemampuan Berpikir Kritis Kimia Siswa SMA Angkasa 1 Jakarta. S1 thesis, Universitas Kristen Indonesia.

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Abstract

Penelitian ini dilaksanakan untuk mengetahui peningkatan kemampuan berpikir kritis kimia siswa dengan mengimplementasikan model pembelajaran PjBL terintegrasi STEM. Metode penelitian yang digunakan adalah quasi experiment dengan desain penelitian yaitu pretest-posttest nonequivalent control group design. Populasi dari penelitian ini yaitu seluruh kelas XI yang terdiri dari lima kelas dan berjumlah 160 siswa. Sampel dalam penelitian ditentukan melalui teknik cluster random sampling dan diperoleh dua kelas, yaitu kelas XI.1.1 dengan 28 siswa sebagai kelas kontrol serta kelas XI.2.2 dengan 31 siswa sebagai kelas eksperimen. Kelas eksperimen diberi perlakuan dengan mengimplementasikan model pembelajaran PjBL terintegrasi STEM. Instrumen yang digunakan dalam penelitian ini adalah instrumen tes berupa soal uraian pada materi larutan penyangga sebanyak enam butir soal yang telah divalidasi dan disusun berdasarkan indikator berpikir kritis. Data yang diperoleh diuji menggunakan uji prasyarat analisis yaitu uji normalitas dan uji homogenitas. Uji normalitas menunjukkan bahwa data tidak terdistribusi normal sedangkan uji homogenitas menunjukkan bahwa sampel penelitian ini berasal dari populasi yang homogen. Selanjutnya, data penelitian dianalisis menggunakan uji non parametrik yang berupa uji Mann-Whitney sebab data tidak terdistribusi normal. Hasil menunjukkan bahwa nilai Asymp. Sig.(2-tailed) sebesar 0,001 (< 0,05), maka H0 ditolak dan Ha diterima. Artinya terdapat peningkatan yang signifikan terhadap kemampuan berpikir kritis siswa. Selain itu, hasil uji N-Gain menunjukkan bahwa skor N-Gain kelas kontrol sebesar 0,41 dan termasuk kategori “sedang”. Sedangkan, skor N-Gain kelas eksperimen sebesar 0,73 dan termasuk kategori “tinggi”. Berdasarkan data tersebut, dapat disimpulkan bahwa terdapat peningkatan kemampuan berpikir kritis kimia siswa dengan mengimplementasikan model pembelajaran PjBL terintegrasi STEM pada sampel penelitian. / This research was carried out to determine the increase in students' chemistry critical thinking skills by implementing STEM integrated PjBL model. The research method used was a quasi experiment with a research design, namely pretest-posttest nonequivalent control group design. The population of this research is all class XI which consists of five classes and a total of 160 students. The sample was determined using a cluster random sampling technique and two classes were obtained, namely class XI.1.1 with 28 students as control class and XI.2.2 with 31 students as experimental class. The experimental class was treated by implementing the STEM integrated PjBL model. The instrument used in this research is a test instrument in the form of six question questions on buffer solution material which have been validated and prepared based on critical thinking indicators. The data obtained was tested using prerequisite analysis tests, namely normality and homogeneity test. The normality test shows that the data is not normally distributed, while the homogeneity test shows that research sample comes from a homogeneous population. Next, the research data was analyzed using a non-parametric test in the form of Mann-Whitney test because the data was not normally distributed. The results show that the value of Asymp. Sig.(2-tailed) is 0.001 (< 0.05), then H0 is rejected and Ha is accepted. This means that there is a significant increase in students' critical thinking abilities. Apart from that, N-Gain test results show that N-Gain score for control class is 0.41 and is in the "medium" category. Meanwhile, N-Gain score for experimental class was 0.73 and is in the "high" category. Based on these data, it can be concluded that there is an increase in students' chemistry critical thinking skills by implementing STEM integrated PjBL model in the research sample.

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