Improving educational practice using the methodological approach known as “lesson study

This project is designed for the improvement of educational practice using the methodological approach known as “lesson study” in the teaching-learning process of mathematics in the first grade of elementary education. The research, which took place in elementary schools of the city of Puebla, was quasi-experimental with a mixed approach and a descriptive correlational study. It showed that there is indeed a relation between reflective teaching and achievement in students. The process of interpretation of the results is described at the end of the article in a descriptive and explanatory way.