I really liked the Common Core early math curriculum. My daughter was taught to do calculations the way I had to come to them myself later on: break the problem

I really liked the Common Core early math curriculum. My daughter was taught to do calculations the way I had to come to them myself later on: break the problem apart into easier pieces. A simple example: If you are adding 73 and 29 break it to 70+20 and 3+9. Quick calculations takes the burden off on harder problems later on. Also, she learned to round and estimate and they did lots of practical math applications -- especially in probability -- so she's learned to think of math in a "common sense" way, for lack of a better word. It's easier for her to look at an answer and say "wait, that doesn't make any sense considering the givens".