At the conference for DS7 his teacher said with Common core they insist that the kids write down explanations for each and every step. They will not let a child progress even tho they know the child can do all that silly stuff in his head. She was showing me his test where he didn't explain how one is able to count by 10s on a hundred chart. She knows that DS knows how to use the chart because all of his answers are right but since he didn't explain well too bad for him. This child of mine easily works on 4th grade math at home. Unfortunately there is only so much time to afterschool - the mind numbing boring stuff they do at school is exhausting for little ones.