Nicholas Kristof

Pulitzer Prize-Winning New York Times Columnist & Political Commentator

Wendy Kopp

CEO of Teach For All & Founder of Teach For America; Childhood Education Advocate

Cory Booker

U.S. Senator from New Jersey; Author of "United" & Former Democratic Presidential Candidate

Maj. Gen. Charles Frank Bolden, Jr.

Former Administrator of NASA & Astronaut; Retired United States Marine Corps General

Reverend Al Sharpton

African-American Preacher & Activist; Foremost Civil Rights Leader; Radio Host on SiriusXM Urban View

Michael B. Horn

Expert & Author on the Future of Education & Blended Learning; Co-Founder of Clayton Christensen Institute for Disruptive Innovation

Howard Gordon

Howard Gordon is an American television writer and producer.

Jeff Hoffman

Serial Entrepreneur, Author & Producer

Hamdi Ulukaya

CEO, President & Founder of Chobani Greek Yogurt

Walter Robb

Former CEO, Whole Foods Market

David McCullough

Historian and Bestselling Author

Wynton Marsalis

Musician; Artistic Director, Jazz at Lincoln Center

Steve Wozniak

Co-Founder of Apple Computer, Inc.

Billie Jean King

Former World #1 Professional Tennis Player & Sports Icon; Advocate for Women's Equality

Annie Lennox

Singer-Songwriter Known for "Sweet Dreams;" Political Activist & Humanitarian

Drew Houston

Co-Founder & CEO of Dropbox

Gabrielle Giffords

Retired Congresswoman; Assassination Attempt Victim in 2011; Founder of "Giffords"

Cal Ripken, Jr.

President & CEO Ripken Baseball, Inc.; Baseball "Ironman" and Legendary Shortstop from the Baltimore Orioles

Ripken says he's cancer-free after March surgery