[unishark]

> I grew up in a trailer park, and didn't have access to the test prep industry, so I understand that wealthier kids had a big edge.

Test prep does not give much of a an edge. It certainly isn't comparable to those point-differences between groups (and therefore the effective "bonus points" often given for being a member of certain groups).

Everything they teach in those prep courses is available in books you can get for a few bucks (like 12-16). If you're really strapped, you can probably get prior years' books for next-to-nothing (this is what I did in the days before the internet, finding them at thrift stores for pennies). I suspect if you compared test prep takers to people who actually worked through the books (or comparable info from the internet) and practice tests the advantage would disappear (if not reverse).