So Says Michelle Malkin: My child’s Common Core-aligned Algebra book is crap

Michelle Malkin exposes many errors in Common Core Math book and informs Houghton Mifflin.

Fascinating read and you've got to love the company's stock answer.

Wouldn't you think a textbook editor would know when it's correct to use "principle" and when to use "principal"?

Common Core is a disaster on so many levels.  Look at the math problems.