Get a champion! (Score 2)

Talk to other members of the staff and try to find someone who is sympathetic or at least aware of GPL/open source/Linux and have them champion your cause. Then, go with them and approach the department chairperson with your ideas. Use all the research as suggested in the other threads. At the same time, begin asking your friends to do the same. The more people that show interest, the more likely the curriculum will change. Also, if there isn't one already, start a Linux club after school. Again, you'll need a faculty member to sponser you. It will take time to make the changes but the result will be worthwhile.