Sarah Guthals, PhD is a social software engineer, entrepreneur, and former engineering manager at GitHub. She is coauthor of Helping Kids with Coding For Dummies. Phil Haack is a former engineering director at GitHub and senior program manager at Microsoft. He is author of a number of books on ASP.NET. Stephen Foster, PhD, is the CEO of ThoughtSTEM, a company that teaches computer science to kids across America. Lindsey Handley, PhD, is the COO of ThoughtSTEM and has hundreds of hours of experience as a classroom instructor for Minecraft-based science and computer science classes.