- Author: Tammie Cumming, M. David Miller, Michael J. Kolen
- Language: English
- Year: 2017
- Author: Brent Duckor, Carrie Holmberg
- Language: English
- Year: 2017
- Author: Rick Stiggins
- Language: English
- Year: 2017
- Author: David W. Grissmer, Peter A. Wilson, B. David Mussington
- Language: English
- Year: 2000
- Author: Keena Arbuthnot
- Language: English
- Year: 2017
- Author: Craig A. Mertler
- Language: English
- Year: 2003
- Author: William Hayes, Adam Urbanski
- Language: English
- Year: 2008
- Author: Gerard Giordano
- Language: English
- Year: 2016
- Author: C.W. Valentine, C.W. Valentine
- Language: English
- Year: 2015
- Author: National Research Council, Division of Behavioral and Social Sciences and Education, Commission on Behavioral and Social Sciences and Education, Committee on Child Development Research and Public Policy, Panel on Selection and Placement of Students in Programs for the Mentally Retarded, National Academy of Sciences
- Language: English
- Year: 1982