The 80-person senior class of San Francisco's private Urban High School is getting tested for HIV. Oliver Hamilton, a student at the school, proposed the project after working with a doctor who treats people with HIV. Hamilton views the event—built on a combination of volunteers, donated oral swab kits and plenty of snacks—as a unique opportunity to use peer pressure to raise awareness and get students tested. Here's hoping the class of 2011 passes with flying colors.