How Save Home-Schooled Children from the Worst Homes?

“Study without desire spoils the memory, and it retains nothing that it takes in.”
–Leonardo da Vinci

Member Andrew Cantrell has started an action, "Reform the laws regulating homeschooling - protect every student's right to education," that addresses concerns I've had about homeschooling: What if the parents of home-schooled children teach the earth is 6,000 years old, that Creationism Intelligent Design is science, that the Protocols of the Elders of Zion is not a hoax, on and on? How do we protect home-schooled children, in other words, from uneducated parents?

I was glad ambivalent to see Andrew initiate the action, but and wonder if we can't collectively brainstorm it as it stands. Because while I agree there's a possible problem in a small percentage of cases, I'm not sure I'm comfortable with his solutions. It seems to me they would hamstring parents following, for example, the unschooling model that many parents have used with great success (see, e.g., the Chicago Sun-Times on an unschooled young woman accepted by Princeton.)

Here's Andrew - tell us what you think:

As they currently stand, the laws put in place to regulate homeschooling are easy to circumvent and therefore potentially dangerous to students and their academic development. In most states there is no way to confirm that requirements, particularly time requirements, are met, and also no way to ensure that the student is progressing at an acceptable rate comparable to or greater than that of the standard set by the local school board. The supervising teachers utilized by many states are unreliable; many of them are biased and some may let their personal bias interfere with their job, resulting in an inaccurate assessment of the student and possibly letting questionable methods or curriculum go unnoticed. My proposals to address some of the issues with the current system regarding homeschooling are listed below:

Standardized testing:
Homeschooled students should be required to take a standardized test under administrative supervision twice every semester to ensure that they're advancing academically at a rate comparable to what is expected of students in their local school district. All core subjects in public school curriculum would be tested, and a failure on any section would result in the student being enrolled in the public school system for the remainder of the academic year.

Student consent:
From the 6th grade on, students should be required to sign a form under administrative supervision that indicates consent to be homeschooled at the beginning of each semester.

State approval for curriculum:
All books intended for use in homeschooling should be required to be cleared by the state in order to count towards the student's graduation. No material would be censored; if this was to be instituted then certain books simply may not be able to pass as curriculum based on the state's judgment. They would still be available for sale and acceptable for use in addition to state-approved curriculum; students would simply not receive credit towards graduation for unapproved curriculum.

St. Sebastian, by Leonardo DaVinci, c. 1480