The project must require at least 15 hours of work on the student's part.

These efforts require long hours and a lot of money.

But the job also requires long hours, sometimes 30 or more per week.

In fact, our plan requires only 24 hours a week of work.

One approach would be to require more than six hours of road time with a professional teacher.

The entire procedure had required more than two hours and a half.

First, they require many more hours of class time than a typical public school.

Approximately 25% of their work requires more than 40 hours a week.

The program requires 12 hours every two years of continuing education.

The new law also requires 30 hours of training for day care workers, twice the 15 now required.