SMART Technologies
Smart: Subtraction Strategies Using Base 10 Blocks
Everyday Math Lesson 6.5 using base-10 blocks.
Illustrative Mathematics
Illustrative Mathematics: Roll & Build
The purpose of this task is to give students practice representing two-digit numbers with concrete objects to reinforce the meaning of the tens digit and the ones digit. Directions and materials needed are included in the lesson.
abcteach
Abcteach: Teach: Decimals
[Free Registration/Login Required] Educators can generate worksheets for primary or elementary grades that focus on decimal addition, subtraction and fraction practice. Worksheets include graphics and answer key.