How to teach tens and units without losing your mind
Figuring out how to teach tens and units is often that first big "math wall" parents and teachers hit when kids move past basic counting. It's one thing for a child to count to twenty, but it's a whole different ball game for them to understand that the "1" in "12" actually represents ten separate things. If you've ever seen a kid write "102" when they meant "12," you know exactly what I'm talking about. ...