There's a problem in public education that no educator, researcher or lawmaker seems to be able to solve. In most urban school districts across the country, including the Austin Independent School District, black and Latino students don't perform as well on standardized tests as their white and Asian peers. In this podcast, KUT's Claire McInerny explores the reasons for this gap — and tells us how one man solved the problem, but it came at too high a price for some educators and parents.