Teachers' Domain
http://www.teachersdomain.org/
Teachers' Domain is an online educational service with two related
components: collections and courses that help teachers enhance
their students' learning experiences and advance their own
teaching skills. The Teachers' Domain collections include
classroom-ready multimedia resources for use in lessons or
independent study, and the Teachers' Domain Professional
Development courses utilize many of the same resources along with
videos of exemplary classroom practice. The collections provide
learning experiences that no textbook can. This ever-expanding
library currently includes collections on life science, physical
science, engineering, earth and space sciences.
Be sure to check out ATE-specific resources in the freshly expanded ATE collection.