Hassan Adeeb, history teacher, Westlake High School
Michele Norris, co-host of NPR's All Things Considered and founder of Race Card Project
Brian Gardner, sheriff, Linn County, Iowa
Keith Woods, vice president for diversity in news and operations, NPR
The death of Trayvon Martin, an unarmed teen who was shot and killed by neighborhood watch volunteer George Zimmerman, has sparked nationwide demonstrations and school walkouts. It has also prompted new conversations about race in America.