@book{186857,
	author = {Ben-Hur, Meir. and ebrary, Inc.},
	title = {Concept-rich mathematics instruction},
	publisher = {Association for Supervision and Curriculum Development,},
	year = {c2006.},
	address = {Alexandria, VA :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10141222}
}