BioInteractive from the Howard Hughes Medical Institute, supports instruction in the life sciences with a plethora of multimedia content, or, as they put it, "Free resources for science teachers and students."
Discovery Education Homework Help The Discovery Channel hosts this helpful list of personally-reviewed sites for students. Choose a subject from the tabs at the top.
Education Development Center, Inc. Founded by MIT scientists, the EDC support 325 projects around the globe, with resources for math, science, urban schools, literacy, early childhood education, etc.
Education World, The Educator's Complete Resource Guide to the Internet Lesson plans, gateway to educational sites, from editors of Education World.
Kennedy Center/ArtsEdge Curricula, lessons, and activities for integrating the arts into classroom teaching in all subjects.
LETSNet, the Learning Exchange for Teachers and Students Lesson plans organized by subject with links to Internet resources, developed by faculty and students from Michigan State and Ameritech.
New York Times Learning Network Connections for students, teachers and parents, with emphasis on using the Times as a learning tool. Includes a daily lesson plan and education news.
No Child Left Behind official government Web site.
PBS TeacherSource Over 1400 lesson plans and activities, including web-based lesson ideas, from the Public Broadcasting Service and its affiliates.
TeacherServe An interactive curriculum service for high school English and History teachers, provided by the National Humanities Center.