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" (ASCD, 2013), "The 5-Minute Teacher" (ASCD, 2013) and "Teaching the iStudent" (Corwin, 2014). A longtime adjunct professor at two Ohio colleges, Mark has created five online courses on web-based instruction, mobile learning, and using Twitter in the classroom and as a professional development tool. A leading expert on student-centered learning, Mark has helped thousands of educators build digitally enh...