Jake’s got a couple posts (first, second) about a bill in the Nebraska State Legislature, LB 1141. According to Jake:
From a quick read, what I gather is that his new bill would require students in unaccredited school situations (read: home-school) to be tested on an annual basis at the parents’ expense in order to ensure adequate progress is being made. If not, parents can be required to enroll their students in a public school.
I don’t really have a lot to add, but if this is something you’ve ever heard debates about it’s worth looking at his posts.

Thanks Cal.
It may be a worthwhile if the testing was provided at government expense. I know homeschoolers who would have benefited deeply from such oversight. Of course, they should also have something for public schoolers as well, to demonstrate that they shouldn’t be privately schooled or that their teachers oughtn’t be fired.