Nearly all dental schools require you to collect teeth, most want you to collect at least a hundred or so - but it's a lot easier than you'd imagine. You simply look up Oral Surgeons in the area around you, call them up, tell them your situation, and ask if you can leave a jar. 8/10 times they'll have no problem, as they had to do the exact same thing. As long as it is stored properly, there's really no significant risk of infection control.
Though, I notice your profile still has you listed as pre-dent - I would wait until you get into a school, as different schools have different methods that they want the teeth stored, etc etc. Real teeth are incredibly useful for dental school, you'd be amazed how much easier it is to cut a prep on a real tooth compared to a plastic tooth. Also, the real time you use them in dental school is during your Endo pre-clinical class - it's important to see some of the complications you can get, which you will never get in fake plastic teeth.