My Yearbook is a success story the likes of which the internet hasn’t seen since web 1.0. A couple teens (with a lot of help from their older brother who owns a company) created a site around being in an American high school.

C|Net has all the information and then some on this site that is clearly made by and designed for teens.

It’s also in a sweet spot for online marketing. Its audience is primarily between the ages of 13 and 22, and nearly all are from the United States.

By next year, Cook hopes to turn MyYearbook into the largest teen media company online, buoyed by a new user-generated magazine and tools that let high schoolers challenge each other to voting duels on topics like best-looking senior. While she’s plotting online domination, she will also be studying international business and marketing at Georgetown University this fall.