Yesterday, I posted about effective fact practice. Developing automaticity with addition and subtraction facts begins with subitizing, which is why it's so important that our Kinder babies get a lot of practice with that skill. The next building building block is knowing combinations for 5 and 10. If a student has instant recall of 3 + 7, it sets the stage for knowing 4 + 7. That's the idea behind teaching facts with a strategy-based approach. Here's a quick and easy little workstation using ordinary playing cards (remove the face cards) to practice combinations for 10. Notice that by using the playing cards and ten-frames, it is a representational (from CRA) activity, which is better for conceptual understanding that abstract flash cards.
Find these making 10 activities at my TpT store:
Common Core: Number Bond Flashcards
Common Core: Missing Parts Flashcards
Common Core: Make 10 Four-in-a-Row Number Combinations to 10