@inproceedings{CHI-2013-AndersenGP,
	author        = "Erik Andersen and Sumit Gulwani and Zoran Popovic",
	booktitle     = "{Proceedings of the 31st ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/2470654.2470764",
	isbn          = "978-1-4503-1899-0",
	pages         = "773--782",
	publisher     = "{ACM}",
	title         = "{A trace-based framework for analyzing and synthesizing educational progressions}",
	year          = 2013,
}