Texas Association for Gifted and Talented (TAGT)
http://www.txgifted.org/

S.P.A.C.E.
www.southlakespace.org

National Association for Gifted and Talented (NAGC)
http://www.nagc.org/

Hoagies- resources, articles, books, links for parents 
about gifted children
http://www.hoagiesgifted.org/

Duke Talent Search
http://www.tip.duke.edu/

TEA  sites for exceptional students
http://www.tea.state.tx.us/tchrtoolbag/EduRes.html

Niemen Center has a wealth of gifted education sites
http://connections.smsd.org/nieman/el/classroo.htm

Special populations- underachieving gifted
http://www.kidsource.com/kidsource/content/underachieving_gifted.html

College Board
http://www.collegeboard.com/splash

Davidson Institute for Talent Development
http://www.ditd.org/

Dr. Bertie Kingore's articles for parents
http://www.bertiekingore.com/articlespar.htm

Academic Leagues 
http://www.academicleagues.com/default.asp