1 Teresa L. Larkin, Department of Computer Science, Audio Technology, and Physics, American University, 4400 Massachusetts Ave. NW, Washington, DC 20016, [email protected] 2 Sarah Irvine Belson, School of Education, American University, 4400 Massachusetts Ave. NW, Washington, DC 20016, [email protected] 3 Dan Budny, University of Pittsburgh, [email protected] Abstract The Blackboard Learning...