From the WSJ:

But McGraw-Hill executives say that the new adaptive e-books will offer better learning methods for a cheaper price than traditional textbooks. Mr. Kibby and Mr. Christensen said that they have seen a lot of demand for their learning products coming from individual students and parents rather than just educators and school officials. [Emphasis mine.]

So, um, anyone surprised? We can’t really call it “opting out” quite yet, but if an education is defined by passing a test…