AACTE - American Association of Colleges of Teacher Education is a great site that includes policy, data and research related to teacher preparation, teacher effectiveness, pathways to teaching and government relations. AACTE is also the source of The Journal of Teacher Education and many of its articles and past issues are archived on the site.
Center for Research on Education, Diversity, and Excellence - CREDE is a federally funded research and development program focused on improving the education of students whose ability to reach their potential is challenged by language or cultural barriers, race, geographic location, or poverty.
Education Week - The leading source of weekly educational news is a wealth of information, updates and resources. This includes the on-line magazine Teacher, with specific focus on the work of p12 teachers.
ERIC is a national information system funded by the U.S. Department of Education’s Institute of Education Sciences to provide access to education literature and resources.
Looksmart – search tool for articles, etc
Questia - the world’s largest online library of over 45,000 books and 360,000 journal, magazine and newspaper articles
U.S. Census Bureau – This is the official website for the U.S. Census Bureau.