This unit is primarily a K-1 resource for number strings. Crafted tighter to be more powerful than just number “talks,” number “strings” ensure the development of numeracy and fluent computation. We’ve listed it under grade 2, just so you know it is available in case you have children who need more work to achieve fluency with basic facts. If you decide to use it in grade 2, use just the last section of the guide with the MathrackTM. Use with small guided groups of children needing work to get the facts automatic. DreamBox will provide the differentiation needed to help kids get the facts automatic as well.29.95