Like someone else already said, it's a couple of classes about alcohol safety and awareness. You listen to some lecture, watch videos, etc. Sometimes they make you go out and attend a local AA meeting. It depends what your situation is and which program you will be put in (there is the basic one 20 hour one, a "young offender", habitual, etc.). I would check it out on this web site:
http://www.vasap.state.va.us/
Remember to always be there on time and get your slip signed for the AA meeting!