The workbook is designed for use in secondary education for grade 7. The photocopiable templates serve to playfully review, strengthen, and consolidate fundamental mathematical knowledge. The use of these puzzles is motivating and is well-suited as homework or as an additional task for breaks. The volume is differentiated into three different levels of difficulty and is equipped with solutions - also for self-checking. Each volume in the series trains the relevant material for the grade level. Organized by topics, each area has three practice pages available - basic, intermediate, and advanced levels. This allows all students to work individually on the same math topic. The results of the tasks are arranged so that solving them yields a fun text or image, which simultaneously allows for self-checking. This popular principle is implemented through coloring, secret codes, dot pictures, dominoes, calculation fields, and mazes. The solutions on the back of the pages facilitate use during practice phases of lessons, in remedial teaching, during substitute lessons, or for homework. 96 pages, with solutions.