Students solve addition problems with 2-digit numbers that also require them to regroup. This is scaffolded by place value charts and base-10 blocks
A. Add tens numbers (Level 1)
B. Add tens numbers (Level 2)
C. Subtract tens numbers (Level 1)
D. Subtract tens numbers (Level 2)
E. Solve addition problems with 2-digit numbers and tens numbers (Level 1)
F. Solve addition problems with 2-digit numbers and tens numbers (Level 2)
G. Solve addition problems with two 2-digit numbers (Level 1)
H. Solve addition problems with two 2-digit numbers (Level 2)
I. Solve addition problems with two 2-digit numbers (Level 3)