So a few months ago I received this AWESOME bag of Dominoes in the mail. I put it aside and kept it specifically for our addition and subtraction unit.
I dumped a quarter of the bag on each of my tables and modeled to my class how to write the numbers from the two sides on their worksheet. They were already familiar with the idea because we'd had a page in our math book that was exactly the same, only with the dots already in place.
It kept them so quiet and engaged! I'm definitely doing this again next year.