[holychiz]

I'll echo the comment that Common Core is not a textbook nor a particular way to add/subtract. It's a standard to establish baseline knowledge US kids must master. That blog post is raging about a new way to do subtract which seems to be out of reach for his comprehension, can't teach an old dog kindda thing, so he blames it on Common Core. He also mentioned that there are 4 new ways to do subtraction. This should be good news. Kids/people learns to do things differently. 4 different ways means kids have more arsenals to tackle their problems. I wish I had that learning opportunity! Specifically about that subtraction, did you noticed that it'd make it easier to do the math in your head? maybe there is a reason for the madness after all.