David Clark is an associate professor in the department of mathematics at Grand Valley State University. He earned his PhD in 2012 at Michigan Technological University. David is a leading proponent of alternative grading in higher education and spreads the word about progressing assessment by co-organizing the annual online grading conference. His book Grading for Growth, which is co-authored with Robert Talbert whose side note has been on Teaching in Higher Ed many times; it's not out yet as of this recording.