This workbook provides a clear and varied introduction to the basic knowledge required for geometry lessons. The foundational training includes very simple initial exercises on geometric drawing, spatial geometry, and symmetrical figures. All exercises are explained in a straightforward, visual, and action-oriented manner. The highlight of the exercises is the creation of a half-timbered house using craft templates, for which specific calculations need to be made. This motivates and fascinates the students, as this exercise feels very relevant to real life. The templates can be used in grades 3 to 6 and come with solutions for self-checking. 40 pages, with solutions.