Weather Underground Educational sources
Not education in its strictest sense. This site presents several articles about subjects in the climate and weather domains.

Natural History Museum Activities and resources
Superbly made and designed for easy use. Unfortunately, there is very little about climate or meteorology.

Bildungsserver Resources on all aspects of education
This site is maintained by the German National Institute for Research in Pedagogy. It contains an enormous amount of information, mainly about policy, organisation and practices in education. It also acts as a portal for access to many other sources on educational reserach and practices worldwide.