National Association for Gifted Education
http://www.nagc.org/

University of Iowa Belin Blank Center for Gifted Education and Talent Development
http://www.education.uiowa.edu/belinblank/

Hoagies’ Gifted Education
http://www.hoagiesgifted.org/

Council for Exceptional Children
http://ericec.org/

Iowa Department of Education (Questions and Answers)
https://www.edinfo.state.ia.us/web/faqs.asp?f=gt0000