J. Duffin

190 Ready-to-Use Activities That Make Math Fun! (Book)

Jim Dorward, Joel Duffin, Larry Cannon, 2004 .

Oer recommender: linking nsdl pathways and opencourseware repositories

Brandon Muramatsu, Joel Duffin, J. Duffin, 2008, JCDL '08.

Decompressing and Aligning the Design Structures of Computer Based Instruction

A. Gibbons, J. Duffin, 2004 .

Linking open course wares and open education resources: creating an effective search and recommendation system

Brett E. Shelton, Yuxuan Wang, Joel Duffin, 2010, RecSysTEL@RecSys.