Abstract
This study aims to determine the effect of the cognitive conflict approach on the critical thinking skills of senior high school students in grade X on straight motion material. This type of research is a pre-experimental research design with One Group Pretest-Posttest Design. The population in this study were all students of class X MIPA SMAN 1 Narmada. The research sample was obtained using a purposive sampling technique, obtained class X MIPA 1 as experimental class 1, class X MIPA 2 as experimental class 2, and class X MIPA 3 as experimental class 3. Data collection on critical thinking skills used essay test as many as 5 questions. Hypothesis test analysis used a statistical paired sample t-test and showed that Ho was rejected and Ha was accepted. This shows that the cognitive conflict approach affects the critical thinking skills of students in straight motion material. This approach can be an alternative solution for various methods/models/approaches in learning physics.