(That link you sent: DS was working with fractions in the summer before Kindy.)
I'm so sorry that things aren't going well. It really hurts. At least you're not alone and at least this group can help in many ways.
As for the CC link: my DD9 is highly accelerated in math at home with me, but that hasn't stopped me from going over the CC standards with her, starting at grade 3. There is a lot of
very important conceptual information in them. These standards were developed by mathematicians and are different from the stuff that you see in textbooks or elsewhere. Their goal is to ensure that kids understand how mathematical ideas fit together at a fundamental level. The differences between them and the basic ideas in textbooks or workbooks are ultimately quite significant. I encourage anyone here who's home- or afterschooling to teach at least the chapter on fractions (unless you're one of the lucky ones whose school teaches this information already). Though really, everything is really good.
