Concrete-Representational-Abstract
You don't need to buy expensive manipulatives to have your child complete the concrete stage at home.
Some ideas:
Counters- Small toys, blocks, beans, post-its
Place Value- Straws or Spaghetti
Fractions- Legos
Grade 1: Using addition and subtraction within 20
Adding three addends
Comparison-How many
Comparison-How many more
Grade 2: Adding two step word problems
Using addition with arrays
Even and Odd
Mental Strategies
Subtract using Mental Strategies
Add/Subtract 2 step word problems
Adding using 2 step word problems
Place Value with three-digit regrouping