Use these to help your students build and represent numbers with Base 10 Blocks, or any other math manipulative you use to make tens and ones. These pages focus specifically on helping students who are beginning to group and count by tens and ones. I kept the numbers below 50, and included frequently confused numbers, such as 12, 21, 20, the "teens", as well as multiple ways to represent a number. Students will benefit from repeated practice with different manipulatives. I also included a blank page for you to design your own practice pages for your students.