Need a lesson plan for a particular unit or theme?  Check out one of these wonderful sites!
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Ancient History Lesson Plans
ArtsEdNet
Awesome Library: Lesson Plans
Collaborative Lesson Archive
Columbia Education Center's Lesson Plans
Connections+
Core Knowledge - Lesson Plans
CRPC Internet Lesson Plans
Elementary Activities
Encarta Lesson Collection
Free Online Unit Studies
Free Worksheets.com
GEM: The Gateway to Educational Materials
History/Social Studies Lesson Plans
K-12 Lesson Plans
KODAK: K-12 Solutions - Lesson Plans
K-12 Science Lesson Plans
Lesson Plans Across the Curriculum
The Lesson Plans Page
Lesson Plan Page
Lesson Plan Sites for K-12 Educators
Lesson Stop
Link 2 Learn
Mathematics Lessons Database
Math Lessons and Courses
Math Lesson Plans
McREL: Lesson Plan Index
Mrs. Donn's Lesson Plans for K-12 Teachers
Outta Ray's Head Lessons
PE Central Lesson Plans
Science Lessons by Subject
SCORE Mathematics Lessons
Stephanie's Lesson Plans
Teachers Helping Teachers
Teachers.Net Lesson Eschange
Teachnet.com: Lesson Plans
Theme-Related Lesson Plans