Mark Barnes is a veteran classroom teacher, education consultant, and author of the critically acclaimed Role Reversal: Achieving Uncommonly Excellent Results in the Student-Centered Classroom and The 5-Minute Teacher: How do I maximize time for learning in my classroom (ASCD, 2013). Mark is the creator of the internationally recognized how-to video site for teachers, learnitin5.com, and the popular online magazine, brilliant-insane.com. Mark tweets at the handle @markbarnes19. He is the author of Assessment 3.0, Teaching the iStudent, and 5 Skills for the Global Learnerpart of the Corwin Connected Educators Series.