>our car-based society allows us to geographically isolate us from the poor
You think that a society needs cars to be geographically isolated from the poor? Ever hear of a thing called history? by this statement I can see that you have not. History tells us that our car-based society allows for more opportunity for the social underclass rather than the opposite.
If you think that funding for schools in poor areas is the problem with our education system - you are out of touch with reality. I grew up in one of those areas and observed first hand the problem. It is not that the children do not have the opportunity to study and get good grades, go to college and get out of poverty.... The problem is that the kids are lazy and they aren't pushed by their parent(s) to do their homework and study. They get into trouble on the streets or play video games instead, girls get pregnant and go on welfare as single moms, guys do drugs and join gangs ending up in jail. Then they blame white people for their problems.
I know this by observation. Why isn't anyone asking the students who come out of these areas with decent to good grades and make something out of themselves. Everyone has their theory but no one wants to hold the parents of these kids accountable. I personally think that parents should be punished if their children don't do well in school, have continual behavioral problems or commit crimes. Cut off the welfare and restrict these parents and their families to living in a shelter and eating bread and water (no money for cable tv, alcohol and ciggies). It is not a good solution, but it is the only solution that will work. No amount of money via welfare or social programs will ever bring the black community out of the continuum they are stuck in.
The Hispanic community has another problem. Most of them are from Mexico or are second generation. The immigrants are usually much better off financially than they were in Mexico even if they are making $6 an hour mowing lawns. Their kids often cannot speak English very well and don't think that that they should have to put in more work than their English speaking counterparts to stay at the same level. Often their parents both work very long hours and do not appreciate the value of their kids education. They like the black parents (but for different reasons) do not require a high level of effort from their kids in regards to education. Again, their has to be consequences for these parents. Investigate the parents of children who never do their homework or are clearly not giving much effort in school. Warn them, then if things don't improve - deport them. I think that we would see quite a lot better grades from Mexicans overnight if this policy was implemented.
If parents don't know how to motivate their children - offer them parenting classes.