A decade of pre-k policy wins has made a Pre-K-12 education system within our nation's reach. U.S. Secretary of Education Arne Duncan, Teach for America CEO and Founder Wendy Kopp, American Federation of Teachers President Randi Weingarten, Harlem Children's Zone President and CEO Geoffrey Canada and Pew Center on the States Managing Director Susan Urahn talk about why we must re-imagine public education as a system that begins, not with kindergarten, but with quality pre-k and builds on that foundation to raise performance in later grades.