Internationally-recognized educator and keynote speaker Mark Barnes is the author of Role Reversal (ASCD, 2013), named a Best Professional Book, The 5-Minute Teacher (ASCD, 2013), Teaching the iStudent (Corwin, 2014), 5 Skills for the Global Learner (Corwin, 2015) and Assessment 3.0: Throw Out Your Grade Book and Inspire Learning (Corwin, 2015), number 1 among Amazon’s hottest education books in early 2015. With over 35,000 followers, @markbarnes19 is regarded as one of education's most influential content curators on Twitter, and his Brilliant or Insane blog is a favorite among educators. Widely recognized as the world's leader of the movement to eliminate traditional grades, Mark is the creator of the global Facebook group, Teachers Throwing Out Grades, and he co-moderates the #TTOG Twitter chat. Mark's SE2R feedback model is used by educators around the world.