Valerie Ziegler, a high school teacher in San Francisco, and Joel Breakstone, executive director of Stanford's Digital Inquiry Group, talk about digital literacy in the classroom. Many self-described "screenagers," they say, can no longer tell real from fake. Together, Ziegler and Breakstone are at the forefront of a movement to prepare young people for a world of influencers, algorithmic manipulation, and artificial intelligence, an effort recently profiled in the New York Times.