Geoff Ralston ran engineering at Four11, where he built RocketMail, one of the first web mail services, which in 1997 became Yahoo! Mail. At Yahoo! Geoff worked in engineering, then ran a business unit, then became Chief Product Officer. After Yahoo! he was CEO of Lala, which was acquired in 2009 by Apple. In 2011 Geoff co-founded the world’s first educational technology accelerator, Imagine K12 which funded dozens of edtech companies including ClassDojo, Remind, and Panorama Education. Imagine K12 merged with YC in 2016. He has an AB in Computer Science from Dartmouth, an MS in Computer Science from Stanford, and an MBA from INSEAD.