How can you 'sell' what you want?
That is a very good question and a very good idea as well. My dad, who also happens to be a teacher, said something similar to that. So far, I have tried another teacher who also had a slight interest in puzzles in general, and presented him the idea of the organization and its course it will take. Then I pulled out my megaminx. He actually said that he would take up the organization if he wasn't the coach of the volleyball team which also occurs after school, but he did suggest asking the teachers in the science department of the school.
Anyways, thanks for the ideas! More are still welcome! And regarding katsmom's advice, if you have any ideas on how to "sell" the idea, that would be great!