Virtual base 10 blocks to model place value, addition, subtraction, regrouping, and more.

FEATURES
1. Ones (units), tens (rods), hundreds (flats), and cubes (thousands)
2. Decimals support
3. Combine and break apart (with animation)
4. Place value mat
5. Factor track
6. Addition mat
7. Subtraction mat
8. Differentiated place value colors
9. Regrouping
10. Snap alignment
11. Show or hide values

MATH TOPICS
1. Number sense
2. Place value
3. Counting
4. Decimals
5. Addition with regrouping
6. Subtraction with regrouping