Your kids at least are learning common core from the beginning and not when they are in middle and high school. There seems to be a problem transitioning these kids. I agreed with it in theory and thought it would be a good way for children to learn. What I am seeing though is that if you do not show your work the one and only way they are teaching then it is wrong. Right answers are not important anymore just the process. My daughter struggles daily with this way of thinking. We can show her different ways (even from what I have learned) that she gets, but it is not the way the teachers are showing. She can get the right answer and is still failing math.