Ripping dvd's for class is a waste of time. All that ripping and encoding. Teachers have to prep for classes after school is over, and they are on their own unpaid time. It's much easier for teachers to find the clips they want on YouTube, since it's likely that their students have already posted the clip... at least until google starts charging for it.
Because XP is soooo amaazing, I've had to re-install office so many times on the same computer that I had to call microsoft to beg them to allow me to install the software again. I'm glad they finally have to pay up.