Startup Idea : Learning from your peers

A friend and I came up with this idea yesterday. Basically, everyone has a special skill, hobby, or passion that excites them, right? Why not provide a way for people to share their knowledge in the form of teaching classes. People would be able to create and organize classes based on their expertise and charge a small fee for entry. Classes could be held anywhere locally (coffee shop, etc) or even online in a group video chat type of format. This would be a pretty cool way to explore new interests, learn new skills, meet people with similar hobbies/skills, and earn a few extra bucks on the side from sharing things you already enjoy! If anyone is interested in partnering up on this idea I'd be really interested to hear from you!