Math Friends is based on the requirements of educational standards and current curricula. It combines the practical experiences of experienced elementary school teachers with the latest findings in elementary pedagogy. The concept of Math Friends ensures the successful development of fundamental mathematical competencies in all children. This new teaching material consistently emphasizes differentiation, independent work with the help of self-assessment, as well as reinforcement through practice, repetition, and application. The components of Math Friends comprehensively cover the learning areas of arithmetic, geometry, and measurement. Practical problem-solving is a permanent component. Additionally, content on combinatorics, probability, and frequency, as well as data collection and its representation in tables and charts, has been included.