Most of the PRT S, PRT L classes meet just once, then you have field sessions. Some are fun, some are kind of boring. You get credit, but not a grade, so it doesn't do much for you as far as graduating or GPA. Avalanche workshop (1.5 hrs) is good, if you want a letter grade do the 2 hour avalanche class, but be prepared to take some actual tests and spend time in the classroom.
I've heard good things about Ski mountaineering - it's taught by some cool guys too. I thought Backcountry ski guide was pretty slow and boring. If you're thinking about a rock climbing class skip Rock climbing I, and if you have experience, go straight to Rock climbing III seminar, basically a fun sport climbing trip down south.
Haha there's my academic advice on the non-classes that are offered, I've done my share.