@inproceedings{CHI-2009-HornSCJ,
	author        = "Michael S. Horn and Erin Treacy Solovey and R. Jordan Crouser and Robert J. K. Jacob",
	booktitle     = "{Proceedings of the 27th ACM SIGCHI Conference on Human Factors in Computing Systems}",
	doi           = "10.1145/1518701.1518851",
	isbn          = "978-1-60558-246-7",
	pages         = "975--984",
	publisher     = "{ACM}",
	title         = "{Comparing the use of tangible and graphical programming languages for informal science education}",
	year          = 2009,
}