L. Lehmann

The Hint Factory: Automatic Generation of Contextualized Help for Existing Computer Aided Instruction

John C. Stamper, T. Barnes, L. Lehmann, 2008 .

Improving performance and retention in computer science courses using a virtual game show

Dale-Marie Wilson, Lorrie Lehmann, Carl Arrington, 2011, ACM-SE '11.

A pilot study on logic proof tutoring using hints generated from historical student data

Tiffany Barnes, John C. Stamper, Marvin J. Croy, 2008, EDM.