A site allowing educators to crowd source their questions. Ask a question, contribute answers.
An online collaboration tool allowing multiple users to co-create a common space. It makes more sense if you visit and explore.
Secure network allowing a teacher to establish class blog, class image album.
An encyclopedia for kids written by kids. Rubric for evaluating entries.
Blummy is a social bookmarking service. The service also provides a wiki-like method for recording additional information.
David Warlick wiki - wiki to support Warlick presentations and activities.
Online bookmarking site - maintain and share bookmarks
WordPress is my recommendation for a blog application a school can run on a local server.
Directory of educational podcasts from England
PBS blog (Andy Carvin) focused on K-12 education, technology, etc.