This certainly is an interesting way to raise money for your local school. While in the classroom I often thought of developing a lesson that would allow students to sell points to other students. Say you are sitting on a 98 average and the person next to you has a 68. How much would that person be willing to pay you for those two desperately needed points?
My plan never got off the ground as I'm sure I would have been visiting the principal within seconds of actually doing this, but you sure could teach a lot of econ by doing this.