Guide for teachers in elementary schools, subject: Mathematics, grades 1-4. Practicing and reviewing is especially important in mathematics lessons for students. These 5-minute exercises playfully reinforce freshly learned content or review fundamentals, ensuring that mathematical knowledge is retained in the long term. All games and exercises can be quickly implemented and bring speed and movement into the classroom - a welcome change for any math lesson. The 55 ideas from the areas of arithmetic, geometry, and practical math are clearly structured according to requirements, social forms, materials, and procedures. Whether for an introduction, as a break in between, or for a conclusion: all ideas can be conducted orally, immediately checked, and are suitable for group use. Content includes: exercises on number decomposition, mental arithmetic, forming quantities, multiplication tables, and addition.