I didn't have kids for so many reasons, but this is one of them, the common core is a detriment to society. It's a methodology of inaccuracy. I would have done great in this system yet I still think it to be dumbing down society. With numbers, there is a right answer.
I never liked formulas and always amazed the teachers that I could logically come up with nearly the right answer, most of the time. But that only gets the student a B.
The first time I saw common core was for simple subtraction problems and my brain had to take a long time to process because it was just over complicated. For people who aren't naturally good at math it can really confuse and hurt students academically. I think that a person should do math the best way for them. If common core works better for some people then go for it...but if the old methods like how I was taught are better for you to comprehend then you should be allowed to use that way instead.
My limited exposure to Common Core made me think it was a wrong way of thinking. If the lower school math confuses the parents, it probably isn't the best idea. Further breaks the family. Parents can't even engage in the homework.