When the kids are quiet, I hold up 1 to 10 fingers over my head. They have to hold up their fingers over their head to make a combination of 10. For example, if I hold up 2 fingers, they hold up 8 fingers. If I hold up 6 fingers, they hold up 4. They cannot talk as we do this. They are doing this as they are lining up. In between problems, I say “erase.” Sometimes I just hold up the fingers, and they start quietly lining up while doing the math combinations. This is a great way for them to learn combinations to 10 AND line up quietly at the same time!