1. Galleons, sickles and knuts. 29 knuts =1 sickle, 17 sickles = 1 galleon.
2. A locked topic with a "master member list" that shows all the galleons someone has (professors award it)
3. Students earn money by enforcing the rules, and answering questions in class
4. Professors/headmistresses get a salary of 30 galleons a month