I actually can't do some of my brothers 5th grade math homework because the questions are so vague. Before common core was enforced, the math they did at his district was pretty good with questions that have a real answer, now almost all of his assignments actually don't want an answer that makes fucking sense.
It makes my younger brother stress out because he can't do it. I'm taking my calc 2 right now and when he asks for help I normally can't help because what they try teaching is fucking retarded. Lattice Multiplication? Not a single soul actually does that outside of elementary school. Counting Tens? Everyone does it subconsciously, trying to explain it in the way they do is insane. The term "number sentence" is something from no child left behind and it's just as bizarre.
It's trying to do good, but it's going at it very poorly. EDIT: Owl, are you actually saying this is a good way to teach kids? Like it's confusing to adults, how can kids be expected to handle any of this bizarro-math well?