This article reports a study on applying micro-teaching to develop content competencies for Geography pre-service teachers in the High School Geography teaching methods module. The study applied an experimental design. The results have demonstrated the effectiveness of micro-teaching for the development of teaching competencies for Geography pre-service teachers. The results of the competence assessment after the experiment in applying geography teaching methods and techniques (AGTMT) are better than before the treatment. In addition, the post-experiment student survey provides specific assessments of the need, impact, and effectiveness of each component of micro-teaching. This study is valuable for teacher training institutions as regards teaching and learning reforms.