Art Johnson Dr. Art Johnson has a wide range of experience in mathematics education. He taught middle and high school mathematics for over 30 years before moving to Boston University, where he taught undergraduate and graduate courses in mathematics education. A present he is retired as a full time professor but still teaches as an adjunct faculty member. Dr. Johnson has written over 50 books and 25 journal articles that span many topics in mathematics education, from mathematics history and geometry to manipulatives and English language learners. Read More Read Less