This research has a purpose to produce a model that can enhance students' mastery of concepts. The model implementation was carried out in Ronas Middle School, Ronas MTs, and Kemlagi 1 Middle School with one group pretest-posttest design. Data collection using observation methods, concept mastery tests, documentation, and questionnaires. The data analysis technique used is descriptive quantitative and qualitative. The results of the study indicate that students have mastery learning outcomes of 100%. Based on the results of the study it can be concluded that there is an effect of the implementation of the MOGE model on the mastery of student concepts.

Keywords : MOGE Model, Student Concept Mastery.