I hope that if you're looking at this, you have first looked at the Add / Subtract Number Family Diamond, Fill-Ins and the Number Family Dominoes in my store. If not, take a look, because these cards continue the learning curve. Here are flash cards, color-coded with addition on one side, related subtraction on other. I like to teach the zeroes, tens and doubles first, then the number families learned through the Diamond and Dominoes. PRINT 2-SIDED ON CARD STOCK - Instructions for doing so are on page 1. BTW, like all the cards I make, they have a little dotted line in the upper right-hand corner so you can snip it off and voilà -- the cards will always be right side up when you align the cut-off corners!
Next to come is the final test of knowledge of add/subtract number families: subtraction timed tests!
Susan, Morris Tutoring Productions