Understanding how to work with expressions involving variables can be such a huge leap for kids. On more than one occasion, I've had students tell me, "I was great at math until it started to involve letters. What's up with that??" What I constantly tried to convey to my students was that a variable is still just a number. When you're feeling stuck, replace it with a number to try and figure out what's going on. So if your students are feeling Keep Reading...