Kathy Schrock's Guide For Educators
A categorized list of sites useful for enhancing curriculum and professional growth.  It is updated often to include the best sites forteaching and learning.

EdHelper.com
Provides links to large numbers of online lesson plans organized by subject.  This site also includes on its entry page a useful set of links to recent articles on education related subjects.

Federal Resources for Educational Excellence
Provides a long lists of educational resources from government agencies and government funded projects by subject area.  

Educational Resources and Lesson Plans
Provides numerous lesson plans that are designed to make use of the Internet and a variety of other useful resources.

108 Technology Tips for Educators
Provides 5 minute instruction on how to do all sorts of useful things with computers and the Internet.

EduHound
Provides a useful classification and listing of a broad range of educational sites. Teacher-related topics such as standards and assessments as well as educational software are included.

History/Social Studies For K-12 Teachers
A large collection of relevant sites.

ABC Teach
Free printables and worksheets for teachers.

Teach P.E.Com
Physical education interactive quizzes

Teachers.Net
A huge variety of teacher resources

TeacherWeb
Classroom website tool.

The Teachers Corner.Net
Teacher resources and lesson plans.

SchoolAndTeacher.com
Free teacher website creator tool.

SchoolNotes.com
Free teacher website creator tool.