Journal of Educational Chemistry (4 (2), 2022, 89-98) Website: https://www.journal.walisongo.ac.id/index.php/jec ISSN 2715-3029 (p) 2685-4880 (e) DOI: 10.21580/jec.2022.4.2.12583 91 Copyright © 2022 JEC | ISSN 2715-3029 (p) 2685-4880 (e) Volume 4, Issue 2, 2022 Effectiveness of Chemscrabb Media Games on Fundamental Laws of Chemistry Towards for Students' Learning Outcomes Annisa Khairani Putri 1 , Fajriah Azra 2* , Elfa Hayati 3 1,2) Universitas Negeri Padang, Indonesia 3) Sekolah Menengah Negeri 10 Padang, Indonesia * E-mail Corresponding Author: bunda_syasfa@yahoo.com Abstract The research aims to determine the effectiveness of Chemistry Scrabble (Chemscrabb) games as Instructional Media on Fundamental Laws of Chemistry to Students Learning Outcomes. This research is a research and development (R&D) with designed by Posttest Only design, in which the design is based on the Thiagarajan technique. The research held on SMAN 10 Padang. Sampling selection was done by Random Cluster Sampling with the result that students of X-Science 2 as the experiment class and students of X-Science 4 as the control class. The data instruments used were a Post-test, questionnaire, and interview of two classes of the sample. The data analysis technique was a Hypothesis test by an Independent T-test sample. Based on Independent T-Test, the obtained tcount is 1.833, where the score is in the curve area, which means that accept H0 (there is no significant difference between the two samples). From the data, the research inference is that the utilization of Chemistry Scrabble (Chemscrabb) games as instructional media on Fundamental Laws of Chemistry for 10th-class sciences students is not effective for 10th-class sciences students' learning outcomes. However, students' activeness in the experiment class in the strengthening process (exercise) is higher than in the control class. Keywords: chemistry scrabble (chemscrabb); effectiveness; fundamental laws of chemistry; learning outcomes Abstrak Tujuan dari penelitian ialah menentukan efektivitas dari Permainan Chemistry Scrabble (Chemscrabb) sebagai media pembelajaran materi Hukum-Hukum Dasar Kimia terhadap hasil belajar Peserta Didik. Jenis penelitian ini yaitu Posttest Only Design yang didasarkan kepada teknik Thiagarajan. Penelitian dilakukan di SMAN 10 Padang. Teknik pengambilan sampel yaitu Random Cluster Sampling dengan sampel yaitu peserta didik kelas X-MIPA 2 sebagai kelas eksperimen dan peserta didik kelas X-MIPA 4 sebagai kelas kontrol. Instrumen penelitian menggunakan soal posttest, kuesioner, dan wawancara pada kedua sampel. Teknik analisis data yaitu Uji Hipotesis dengan menggunakan Uji Independent T test. Berdasarkan hasil dari uji Hipotesis Independent T test yaitu didapatkan nilai thitung sebesar 1,833, dimana hasil uji hipotesis berada pada kurva two tailed yang berarti terima H0 (tidak ada perbedaan yang signifikan antara kedua kelas sampel). Kesimpulan yang dapat diambil dari penelitian adalah penggunaan permainan Chemistry Scrabble (Chemscrabb) sebagai media pembelajaran pada materi Hukum-Hukum Dasar Kimia kelas X MIPA di SMAN 10 Padang tidak efektif terhadap hasil belajar peserta didik. Tetapi, keaktifan dan semangat peserta didik dalam melakukan latihan pada proses pemantapan konsep lebih tinggi daripada kelas kontrol. Kata kunci: chemistry scrabble (chemscrabb); efektivitas; hukum-hukum dasar kimia; hasil belajar peserta didik