In 2001's notorious weed anthem "Because I Got High," Afroman recalled, "I was gonna go to class, before I got high/ I coulda cheated and I coulda passed, but I got high/ I'm taking it next semester and I know why (Why man?)/ 'Cause I got high, because I got high, because I got high."

If this becomes a problem for students at a new trade school in California, however, chances are their professors will cut them some slack. Class is now in session at Oaksterdam University, a downtown Oakland institute that offers a full cannabis curriculum.

For about $75 a pop, Oaksterdam (a play on weed-friendly city Amsterdam) hosts two to three-hour courses in cooking and baking with cannabis, the political and legal history of the drug, "cannabusiness" and a hands-on course in pot cultivation, among others.