Online Lessons

Academy Curriculum Exchange - http://ofcn.org/cyber.serv/academy/ace/

ASKEric Lesson Plans (listed by topic area...a good resource) -  http://ericir.syr.edu/Virtual/Lessons/

Blue Web'n (a comprehensive collection of lesson plans listed by discipline) - http://www.kn.pacbell.com/wired/bluewebn/index.html#table

Center for Adolescent Studies (Indiana University) Lesson Plans (this collection of electronic lesson plans covers a variety of topic areas) - http://education.indiana.edu/cas/ttforum/lesson.html

Collaborative Lesson Archive - http://faldo.atmos.uiuc.edu/CLA

The Explorer (a collection of educational resources (instructional software, lab activities, lesson plans, and student created materials for K-12 mathematics and science education) - http://unite.ukans.edu/

Houghton-Mifflin K-8 Activities (hundreds of activities for students of all ages! + interdisciplinary lessons) - http://www.eduplace.com/search/index.html

In2Edu: Themes and Thematic Units - http://www.in2edu.com/
Internet Field trips (another collection from Indiana University) - http://education.indiana.edu/cas/ttforum/fieldtrip.html

Math and Sciences Lesson Plans - http://scssi.scetv.org/mims/lessplns.htm

Pathfinder Schoolhouse - http://www.teacherpathfinder.org/School/school.html

QUEST: NASAs K-12 Internet Initiative (look in Classes you can teach using the internet) -  http://quest.arc.nasa.gov/

SchoolNet-Canada -  http://www.schoolnet.ca/

TEAMS Distance Learning-Los Angeles (K-12 lesson plans listed by topic area) - http://teams.lacoe.edu/documentation/places/lessons.html