This study aims to describe the effect of the use of multirepresentation contextual module on learning Gravity Newton Law on understanding the concept of students. This research was conducted at SMAN 14 Bandar Lampung with Quassy Experimental design type pretest-posstest control group design. The result of N-gain test that has been done shows that the average of Ngain from class using multideprescription contextual module is higher that is 0,75 with high category. Hypothesis test results

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... d that there is a difference in understanding the understanding of physics concepts between students who learn to use multirepresentative-based contextual module with the use of school print books. To measure of understanding of the concept of student using Certainty of Respone Index (CRI.) The value of students concept understanding is shown by the more dominant students understand concept with 64.66% percentage, guess 14,10%, misconception 7,14%, and do not understand concept 14,10%.