Powell, Jay C. (2010) Testing as Feedback to Inform Teaching. Chapter 3 in; Learning and Instruction in the Digital Age, Part 1. Cognitive Approaches to Learning and Instruction. (J. Michael Spector, Dirk Ifenthaler, Pedro Isaias, Kinshuk and Demetrios Sampson, Eds.), New York: Springer. ISBN978-1-4419-1551-1, doi:10.1007/978-1-4419-1551-1