In this insightful talk, Dr. Johnothon Sauer discusses what it means to teach in the 21st century - and what it means to learn. Drawing from his one experience as a teachers, he brings a fresh take on approaching education. Johnothon Sauer is one of the teacher leaders for the mathematics department at William Mason High School. 2018-2019 will be his 18th year at Mason High School and his 29th year of teaching. Raised in Columbus, Ohio, Johnothon earned his B.S.Ed. from The Ohio State University, taking courses that led to his certification to teach mathematics and music in grades 7-12. He subsequently earned his M.A.T. and Ph.D. in Mathematics from The University of Cincinnati. Johnothon is a strong advocate of student-centered, discussion-based learning, and in particular of the Harkness Method of instruction, as well as of evidence-based assessment. He and his wife have been married for 28 years. They have four children ranging in age from 26 to 16. This talk was given at a TEDx eve...