@book{23687,
	author = {Van de Walle John, Karen Karp, LouAnn Lovin and Bay-Williams Jeniffer},
	title = {Teaching Student-Centered Mathematics: Developmentally Appropriate Instruction for Grades 3-5: Volume 2},
	publisher = {Pearson},
	year = {2014},
	address = {New York},
	edition = {2nd Ed.}
}