Cognitive Scientist; Former K-12 Teacher; Former Director of K-12 Student Assessment, Illinois State Department of Education; Founder, RetrievalPractice.org; Assistant Professor, Berklee College of Music; Former Project Lead, HarvardX (Massive Open Online Courses), Harvard University; Author, Powerful Teaching: Unleash the Science of Learning (2019); Co-Author, "Benefits from Retrieval Practice Are Greater for Students with Lower Working Memory Capacity" (2017, Memory), "Both Multiple-Choice and Short-Answer Quizzes Enhance Later Exam Performance in Middle and High School Classes" (2014, Journal of Experimental Psychology), and "Advances in Cognitive Psychology Relevant to Education" (2012, Educational Psychology Review)