Animation Library (an excellent site for animated icons)
www.animationlibrary.com
Classroom Clipart
www.classroomclipart.com
Learn It
http://nortellearnit.org/lessons/Lesson_Plans_by_Technology
Educators Reference Desk
http://www.eduref.org/Virtual/Lessons/
Discovery Channel
http://school.discovery.com/lessonplans/
LessonPlanz
http://www.lessonplanz.com/
Marco Polo Education
http://www.marcopolo-education.org/home.aspx
teAchnology
http://www.teach-nology.com/teachers/lesson_plans/science/
AOL @ School
http://www.aolatschool.com/educators
PBS Teachers
http://www.pbs.org/teachers/