Teach addition and subtraction within 10 through two digit addition and subtraction and 3 digit addition and subtraction with regrouping and without regrouping, using base ten blocks, expanded form, number line, standard algorithm, and break apart strategies on clear math anchor charts and posters. Feeling like you’re reteaching addition and subtraction… again? You introduce a strategy. Students nod along. And then five minutes later, they’re stuck. This set of addition and subtraction anchor c