@article {541751,
	title = {Correlating skill and improvement in 2 MOOCs with a student{\textquoteright}s time on tasks},
	journal = {Proceedings of the First ACM conference on Learning @ scale conference - L@S {\textquoteright}14},
	year = {2014},
	pages = {11-20},
	url = {http://dl.acm.org/citation.cfm?id=2566250},
	author = {Champaign, J. and Colvin, K. F. and Liu, A. and Fredericks, C. and Seaton, D. and Pritchard, D. E.}
}
