Common core. So kids have the same opportunity to fail.
Think about it. Common core just makes everything harder and takes more time. I could complete this 100 page math homework in 15 minutes with the old fashioned way. With the common core way? 7 hours. And they yield the same results!
The way that common core makes you find the answer to a problem is convoluted and overly complex. I see no reason why we should make simple math problems more complicated than they have to be. I am not a teacher so I can not give as good an opinion compared to one, and I wish to be enlightened.