The materials have been specifically developed for children who are taught with different learning objectives in a primary school class. However, they are also generally suitable for working with children who show an increased need for support in mathematics. All topics are covered in detail, starting at the most basic level. Each topic is addressed on at least a double page, with the numerical range being expanded slowly. Illustrations focus on the essentials. Suitable teaching aids and visualizations accompany the work, and the transition from material handling is done gently. Easily understandable, repetitive exercise forms create a calm practice environment and success experiences.