"Therefore, this will be the most comprehensive national study ever taken."

The Carnegie report is the first major national study to focus on adolescence and middle schools.

This imbalance has become the subject of national and international studies.

A1 High school students lack knowledge of basic economic concepts, according to a national study.

More than 50,000 students were surveyed last spring for the 21st annual national study.

But until now, he said, there had been no national study.

Virtually anyone can learn to read, national studies show, but it does not come naturally.

"A national study showed that there's only a 1 to 2 percent difference in the number of men and women leaving," she said.

"We know, from national studies, that even left alone, students make progress," he said.

So far she has not enrolled a single woman in the national study.