This is one of the more interesting ideas out there, but not original (since it's been used in European countries for decades). And it could save cash-strapped public schools a lot of money:

Dozens of public high schools in eight states will introduce a program next year allowing 10th graders who pass a battery of tests to get a diploma two years early and immediately enroll in community college.

Students who pass but aspire to attend a selective college may continue with college preparatory courses in their junior and senior years, organizers of the new effort said. Students who fail the 10th-grade tests, known as board exams, can try again at the end of their 11th and 12th grades. The tests would cover not only English and math but also subjects like science and history.

The new system of high school coursework with the accompanying board examinations is modeled largely on systems in high-performing nations including Denmark, England, Finland, France and Singapore.

The program is being organized by the National Center on Education and the Economy, and its goals include insuring that students have mastered a set of basic requirements and reducing the numbers of high school graduates who need remedial courses when they enroll in college. More than a million college freshmen across America must take remedial courses each year, and many drop out before getting a degree.

“That’s a central problem we’re trying to address, the enormous failure rate of these kids when they go to the open admission colleges,” said Marc S. Tucker, president of the center, a Washington-based nonprofit. “We’ve looked at schools all over the world, and if you walk into a high school in the countries that use these board exams, you’ll see kids working hard, whether they want to be a carpenter or a brain surgeon.”