Math Friends is based on the requirements of educational standards and current curricula. It combines the practical experiences of established elementary school teachers with the latest findings in elementary education didactics. The concept of Math Friends ensures the successful development of fundamental mathematical competencies in all children. This new teaching material consistently employs methods of differentiation, independent work with self-assessment, and reinforcement through practice, repetition, and application. The components of Math Friends comprehensively cover the learning areas of arithmetic, geometry, and measurement. Practical calculations are 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.