SUMMARY
Penelitian tentang penerapan model pembelajaran kooperatif Word Square untuk meningkatkan prestasi belajar kimia siswa pada pokok bahasan koloid di kelas XI SMASCerdas Murrni yang telah dilaksanakan pada bulan Mei 2015.Tujuan dari penelitian adalah untuk mengetahui apakah penerapan model pembelajaran kooperatif Word Square dapat meningkatkan prestasi belajar kimia siswa pada pokok bahasan koloid.Sampel dalam penelitian ini adalah kelas XI IPA 1 dan kelas XI IPA 2 T.A 2015/2016yang telah diuji kehomogenannya.Kelas XI IPA 1 diambil secara acak sebagai kelas eksperimen dan kelas XI IPA 2 sebgai kelas kontrol.Pembelajaran kooperatif Word Square diterapkan di kelas XI IPA 1.Hasil penelitian menunjukkan bahwa pembelajaran kooperatif Word Square dapat meningkatkan prestasi belajar kimia siswa pada pokok bahasan koloid. Peningkatan prestasi belajarkimia siswa di kelas eksperimen didukung oleh skor gain ternormalisasi (N-Gain) sebesar 0,83. The study of the application of the Word Square cooperative learning model to improve students' chemistry learning achievement on the subject of colloids in XI grade of SMAS Cerdas Murni had been conducted in May 2015. The purpose of the study was to determine whether the application of Word Square cooperative learning models could improve student chemistry learning achievement on the subject of colloid. The samples were XI IPA 1 and XI IPA 2 classes in 2015/2016 which had been tested for their homogeneity. XI IPA 1 was taken randomly as experimental class and XI IPA 2 as control class. Word Square cooperative learning was applied in XI IPA 1 class. The results of the study showed that Word Square cooperative learning could improve students' chemistry learning achievement on colloidal topics. The increase of chemistry learning achievement of students in the experimental class was supported by a normalized gain score (N-Gain) of 0.83.