Hallway is a social media site and mobile app created entirely by high school students. Students load class schedules and connect to students at their school, and even around the world. Then they can post questions for other students to answer.
The app generated enough buzz to be included by Microsoft in the Windows 8 launch and even exceeded investment goals.
Co-creator Sean McElrath, 17, wanted to give students a chance to get answers to their questions outside of the classroom.
"It takes the fear out of raising your hand," McElrath said.