"Higher education has been able to duck this issue for years, particularly the more selective schools, by saying the onus is on the individual student," says Pennington of the Gates Foundation. "If they fail, it's their fault." Some critics blame affirmative action—students admitted with lower test scores and grades from shaky high schools often struggle at elite schools. But a bigger problem may be that poor high schools often send their students to colleges for which they are, in educators' jargon, "undermatched": they could get into more elite, richer schools, but instead go to community colleges and low-rated state schools that lack the resources to help them. Some schools out for profit cynically jack up tuitions and count on student loans and federal aid to foot the bill—knowing full well that the students won't make it. "Colleges know that a lot of kids they take will end up in remedial classes, for which they'll get no college credit and then they'll flunk out," says Amy Wilkins of the Education Trust. "The school gets to keep the money, but the kid leaves with loads of debt and no degree and no ability to get a better job. Colleges are not holding up their end."

A college education is getting ever more expensive. Since 1982 tuitions have been rising at roughly twice the rate of inflation. University administrators insist that most of those hikes are matched by increased scholarship grants or loans, but the recession has slashed private endowments and cut into state spending on high-er education. In 2008 the net cost of attending a four-year public -university—after financial aid—equaled 28 percent of median family income, while a four-year private university cost 76 percent of median family income. More and more scholarships are based on merit, not need. Poorer students are not always the best-informed consumers. Often they wind up deeply in debt or simply unable to pay after a year or two and must drop out.

There once was a time when universities took a perverse pride in their attrition rates. Professors would begin the year by saying, "Look to the right and look to the left. One of you is not going to be here by the end of the year." But such a Darwinian spirit is beginning to give way as at least a few colleges face up to the graduation gap. At the University of Wisconsin–Madison, the gap has been roughly halved over the last three years. The university has poured resources into peer counseling to help students from inner-city schools adjust to the rigor and faster pace of a university classroom—and also to help minority students overcome the stereotype that they are less qualified. Wisconsin has a "laserlike focus" on building up student skills in the first three months, according to vice provost Damon Williams.

State and federal governments could sharpen that focus everywhere by broadly publishing minority graduation rates. (For now students and counselors must find their way to the Web site of the Education Trust, which compares data obtained from schools by the federal government.) For years private colleges such as Princeton and MIT have had success bringing minorities onto campus in the summer before freshman year to give them a head start on college-level courses. The newer trend is to start recruiting poor and nonwhite students as early as the seventh grade, using innovative tools like hip-hop competitions to identify kids with sophisticated verbal finesse. Such programs can be expensive, of course, but cheap compared with the millions already invested in scholarships and grants for kids who have little chance to graduate without special support.

With effort and money, the graduation gap can be closed. Washington and Lee is a small, selective school with a preppy feel in Lexington, Va. Its student body is less than 5 percent black and less than 2 percent Latino. While the school usually graduated about 90 percent of its whites, the graduation rate of its blacks and Latinos had dipped to 63 percent by 2007. "We went through a dramatic shift," says Dawn Watkins, the vice president for student affairs. The school aggressively pushed mentoring of minorities by other students and "partnering" with parents at a special pre-enrollment session. The school had its first-ever black homecoming. Last spring the school graduated the same proportion of minorities as it did whites. If the United States wants to keep up in the global economic race, it will have to pay systematic attention to graduating minorities, not just enrolling them.

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