This fun Valentine's Day center is a great way to enforce a thorough understanding of addition and subtraction. My students love traditional "Write the Room" exercises, so this center is a take off of that idea.
I printed and laminated the picture cards, then hung them all around my classroom. When my students visit this center, they each get a clipboard and a copy of the record sheet. Then they walk around the room and write a subtraction equation for each card. The answer key makes checking them a breeze, and also helps me see where each child needs help (if they are not sure what to count to get the initial number for instance).
This center reinforces several of the Kindergarten and First Grade Common Core objectives in Operations and Algebraic Thinking.