<![CDATA[This research is to describe the abilities to find similarities and differences and to indentify the conclusion of colloid subject using problem solving to high, middle, and low group of students. The subject were student of XI IPA5 class in SMAN 1 Natar, academic year 2012/2013 that. This research used pre-experimental method, and one-shot case study design. The result shows that ability to find the similarities and differences are, in high group 40% were excellent and 60% is good. In middle group, 20% were excellent, 55% were good and 25% were enough. And in low group, 40% were good, 40% were enough and 20% were poor. The ability to identify the conclusion, in high group, 40% were a excellent criteria and 60% were a good criteria. In middle group 15% were excellent, 50% were good and 35% were enough. And in low group, 30% were good, 50% were enough and 20% were poor.Penelitian ini bertujuan untuk mendeskripsikan kemampuan mencari persamaan dan perbedaan serta mengidentifikasi kesimpulan pada materi koloid menggunakan model pembelajaran problem solving untuk siswa kelompok tinggi, sedang dan rendah. Subyek penelitian ini adalah siswa kelas XI IPA5 Tahun Ajaran 2012/2013 SMA N 1 Natar. Penelitian ini menggunakan metode pre-experimental dan one-shot case study design. Hasil penelitian menunjukkan. Pada kelompok tinggi 40% berkriteria sangat baik dan 60% baik; kelompok sedang 20% berkriteria sangat baik, 55% baik dan 25% cukup; sedangkan untuk kelompok rendah 40% berkriteria baik, 40% cukup dan 20% kurang. Keterampilan mengidentifikasi kesimpulan untuk kelompok tinggi 40% berkriteria sangat baik dan 60% baik; kelompok sedang 15% berkriteria sangat baik, 50% baik dan 35% cukup, sedangkan untuk kelompok rendah 30% berkriteria baik, 50% cukup dan 20% kurang.Kata kunci : kemampuan mencari persamaan dan perbedaan, kemampuan mengidentifikasi kesimpulan, problem solving.]]>
