Common Core math problem: what is a "Mentally Visualized 5-Group"?

[Colibri]

@CC

There is so much wrong with public education these days, and the standardizing of curriculum is just one piece of it. Where are the “get the government off our backs” people when there’s an actual need for them? Answer: they’re behind all this federal testing/common core crap. Agh - don’t get me started.

Moderator Note

CC, political opinions don’t belong in GQ. No warning issued, but since you have started, let’s not continue.

Colibri
General Questions Moderator