American Educational Research Association (AERA) -This is a professional organization that promotes scholarly inquiry into education-related processes.
http://www.aera.net/

Northern Rocky Mountain Educational Research Association (NRMERA) - This is a regional organization that encourages educational research that is applied in school settings. http://www.nrmera.org/

APA Online - Among other things, this includes product information & tips for using APA style. http://www.apastyle.org/elecref.html

This link allows you to calculate an independent or dependent t-test.
http://www.physics.csbsju.edu/stats/t-test.html

Buros Center for Testing - This is a site that can be used to help find reviews and other information about instruments used in educational measurement. 
http://www.unl.edu/buros