Challenging practice material for independent acquisition of mathematical fundamentals! This volume offers clearly structured worksheets with solutions for student-centered instruction, which can be used right from the introduction of a new topic. Each page focuses on a key theme. The learning tasks enable individual and independent learning in the most important areas of the grade level. They closely align with the competency expectations of the curricula, with solutions provided in full within the volume. The goal is not only to practice familiar concepts with altered questions but also to creatively explore new learning and problem-solving paths. Puzzles, tasks for partner and group work, tasks with self-check options, and suggestions for evaluating one's own skills promote the acquisition of mathematical knowledge and abilities.