The New York Times article: Quizzes should be used to learn and not just for exams.

Here's a quote:

In an experiment published late last year, two University of Texas psychologists threw out the final exam for the 900 students in their intro psych course and replaced it with a series of short quizzes that students took on their laptops at the beginning of each class.

“They didn’t like it, at least at first,” said one of the professors, James W. Pennebaker. The other professor, Samuel D. Gosling, added, “For the first few weeks, every time their friends went out drinking, they couldn’t go — they had yet another quiz the next day.”

But they did significantly better than a comparison intro psych class, both in their grades and on a larger quiz that included 17 of the same questions that appeared both in the quizzes and on the other class’s midterm. The quizzes were especially beneficial for the type of students — many from low-performing high schools — who don’t realize how far behind they are until it’s too late. []