This research aims to increase learning activities and learning outcomes through the application of problem solving methods guided to the basic laws of chemistry class X Mia. This study was conducted in class X sma Negeri 1 Tompaso with a sample number of 20 people. This study is a Class Action Research consisting of 2 cycles. Each cycle includes 4 stages, namely planning, implementation, documentation observation, tests and questionnaires. Data analysis uses descriptive methods. The results showed that the application of guided problem solving methods can increase learning activity (from 64% in cycle 1 to 85% in cycle II) as well as affective aspects (from 68.16% to 75.44%) in the basic laws of chemistry class X Mia Sma Negeri 1 Tompaso school year 2018/2019.
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