Check these out and share with colleagues:
Go Green: Education for the Ecosystem, from Edutopia: includes lesson plans and the Green database.
BBC: Learning English offers many activities to engage new language learners; site is highly reviewed by VSB ESL consultant Betty.
Technology How-to: Loads of helpsheets here for everything from basics to Web 2.0 tools.
open thinking: 90+ videos internet videos for teaching media and technology literacy
WatchKnow: from the founder of Wikipedia comes this library of 11 000 educational videos
Copyright-friendly Images and Sounds: loads of sources here but be sure to check for site requirements for using them.
Heroines.ca: A Guide to Women in Canadian History
BioSciEdNet: a rich portal of resources for teaching science
Art Through Time: A Global View is suited to high school and contains videos and web resources
Michelangelo Public and Private: Drawings for the Sistine Chapel and Other Treasures from the Casa Buonarroti, an audio slideshow from the Seattle Art Museum exhibition to January 31, 2010.