Mathetiger 4 consistently prepares students for the completion of their primary school education and the transition to secondary schools. The standards of the educational curricula are optimally met. The innovations of modern primary school didactics (mathematizing, application and structure orientation, theme-oriented mathematics, puzzles, etc.) are given as much importance as the classical content. The development of process-oriented competencies (communicating, arguing, problem-solving, presenting, and modeling) is promoted on every page. Problem-solving is particularly supported by the 8 pages of "Mathetiger's Brain Gymnastics," where children must develop strategies to arrive at a solution. Modeling as a process for mathematically understanding the environment is continued in a variety of interesting thematic areas.