With the help of a child-friendly framework, children experience the number range from 1 to 10 as a small adventure: they conquer islands with different treasures alongside pirates and must stand up to mutineers like Mr. Cheater or the thieving magpie. However, it is not only the theme but also the innovative concept of this volume that particularly supports children who struggle with math. The goal is to achieve the automation of basic tasks up to 10 through structured representations of quantities. This is accomplished in 5 practice units: 1. Quantity recognition with structured quantity images 2. Exercises on number decomposition and completion 3. Understanding addition and subtraction 4. Automating addition and subtraction tasks 5. Additional exercises, games, and strategies related to 10. All 5 units include concrete suggestions for teaching as well as practical differentiation tips.