"In general, colleges are still not prepared," said David Longanecker, executive director of the interstate commission. Its report, "Knocking at the College Door," is released every five years and is used by local school districts, states and higher education to track enrollment trends.

"We know there is a relationship between race and income and academic preparedness," Longanecker said. "But we don't have the support services in place to enhance the success that we need."

Using data compiled from the nation's leading test-makers, the U.S. census and other sources, the WICHE study projects a significant regional shift in the school-age population to the South and West that follows general population trends.

In 2007-08, Southern states are expected to enroll 16.7 million students in kindergarten through high school. WICHE said enrollment in Western schools will be 11.9 million in 2007-08, followed by 10.8 million in the Midwest and 9.3 million in the Northeast.

Because of continuing gains in Hispanic enrollment, the report said, white students will represent a minority of graduates from Western high schools in 2013-14.

Although Hispanics enroll in college at almost the same rate as non-Hispanic students, they often bring special circumstances to school, said Richard Fry, a senior research associate with the Pew Hispanic Trust.

Hispanics are less likely to attend college full-time and are more likely to work so they can provide financial support to dependents, Fry said.

"In order to help these students receive degrees — particularly bachelor's degrees, but also associate's degrees and vocational credentials — you have to help them negotiate their work lives, their family lives, as well as their academic lives," Fry said.

He said community colleges, in particular, need to improve tutorial services for Hispanic students placed in remedial academic and vocational training programs.

T. Jaime Chahin, a scholar at the Tomas Rivera Center at Trinity University in San Antonio, said that some schools, especially in the Southwest, are making progress integrating Hispanic culture into campus life.

But he said schools across the country need to do a better job of recruiting and retaining Hispanic faculty members who can serve as role models for Hispanic undergraduates.

The process of pushing Hispanics toward college degrees needs to begin at the elementary school level, he added.