Understanding math? You probably hear this phrase repeatedly in your math class: "I don't understand this!" In some cases, this isn't just evasive behavior from the student; it actually indicates a lack of important foundational knowledge that hasn't been grasped yet. How should you handle this? Step by step towards foundational understanding. This volume provides you with materials to systematically close gaps in the place value system and the associated arithmetic operations, ensuring that new content is learned and understood more effectively. You will receive worksheets as templates based on the model by Wartha and Schulz. This model is based on four steps: concrete action, observing and acting, representing and describing, and keeping all (intermediate steps) in mind. This approach successfully supports students with math difficulties!.