%0 Journal Article %T Grand Challenges in Digital Education %A Clifford A. Shaffer %J Frontiers in ICT %D 2014 %R 10.3389/fict.2014.00005 %K digital education %K MOOCs %K online education %K intelligent tutoring systems %K automated assessment %K online courses %K courseware %U http://www.frontiersin.org/Journal/10.3389/fict.2014.00005/full