| Description:
 Compose and decompose numbers from 11 to 19 with and without visuals. Adaptive Learning Progression: Start with just counting, then do base 10 equation with visuals, then do the same equation without visuals. | Start using MathScore for free | 
Sample Levels (out of 6)
| Choose the tens + ones form of the number -- for example, 1X = 10 + X. | |
| Choose the tens + ones form of the number -- for example, 1X = 10 + X. | |
| Choose the tens + ones form of the number -- for example, 1X = 10 + X. | 
