Studies that discuss the concept of developing mathematics learning in elementary school include the nature of elementary school mathematics, elementary school mathematics curriculum, understanding mathematics, teaching through problem solving, problem-based teaching planning, assessment in teaching, multicultural mathematics teaching, use of technology and media, development design methods, development Learners of Mathematical Concepts (Numbers, Measurement and Geometry, Presentation and Data Processing), and learning development practices. The assessment is carried out by involving student activity through assignment presentations and in-depth discussions of the main material. The assessment activity ends with a discussion of the discussion and reflection activities.