Education research often requires finding statistical information. Here are some excellent resources:
National Center for Education Statistics - the primary federal entity for collecting and analyzing data related to education in the U.S. and worldwide, providing current and projected statistics on elementary, secondary, and higher education in such sources as:
ChildStats.gov - provides easy access to federal and state statistics and reports on children and their families, including population and family characteristics, economic security, health, behavior, social environment, and education.
Census Bureau - education data related to educational attainment, field of training, school costs, and school environment.