This research aims to determine the effectiveness of physics learning by open-ended approach in lesson dynamic electric to students’ physics concept comprehension in class X5 IPA SMAN 10 Pekanbaru. The subjects were students of class X5 IPA and class X3 IPA. Class X5 IPA as eksperiment’s class totalling 40 students, consisting of 12 male students and 28 female students. While class X3 IPA a…