Public schools with diverse student populations are far more likely than those with homogeneous populations to be labeled as failing under President Bush's education law, according to a new California study. The study examined why 3,000 of the 7,669 public schools in California were designated as "needing improvement" under the terms of the federal law, a category that obligates districts to provide transportation for students wishing to transfer to other schools and brings other sanctions in subsequent years. The study found that many of the 3,000 schools were designated not because tests had shown their overall achievement levels to be...