A professor at Seton Hall University has figured out how to accurately predict district test scores using parent income and other available demographic data. This goes to show that the tests do not show that charters, vouchers or other factors have a big impact on student scores. It's all about their parents. The tests do not show us which schools are failing. They show us where the impoverished children live. There are better ways to locate poor families other than giving their children hours of test prep and tests.