Hands-on math centers to reinforce numbers 1 to 20, addition, and subtraction. Easily differentiate this activity by choosing which math skill to work on to consolidate their learning. Make math fun and engaging for all your students with these independent activities, just add manipulatives!What is included:→ 4 work mats: ⇨ There are three spaces on each work mat: Pick a number/math sentence, a place to build the number or solve the math problem, and a space to practice writin