How do we Measure Poverty?

Check out this interesting link regarding the rising tide of homeless students. http://www.msnbc.msn.com/id/29356160/from/ET/ How can we accurately measure NCLB when more and more children are becoming transient. Is it fair to measure equity in the classroom, when our economic climate is inequitable? Should one school district, that has a policy of fairness and equity towards the homeless population be graded any less successful than a district that discourages people from joining their census. How do we measure rural poverty? How do we measure corridors of poverty? Corridors of poverty exist when a region is so poor, families move district to district within one year. Tough questions, for tough economic times.