Earth Learning Idea (ELI) - a leading web site for earth science education - recently celebrated the publication of its 100th activity online. Every two weeks, ELI publishes a new Earth-related teaching activity, designed to be a practical resource for teachers and teacher-trainers. Most activities require minimal cost and equipment.
NASA has made available educational resources useful for Earth science classrooms:
PBS Nova has a series of short web videos where scientists describe what they study in 30 seconds and also describe their interests inside and outside the lab.
IRIS (The Incorporated Research Institutions for Seismology) posts resources for magnitude 7 and larger earthquakes worldwide (including the tsunami in Japan) usually within 24 hours. Visit the IRIS site for "teachable moment" resources: http://www.iris.edu/hq/retm Sign up for their notification service when new resources are added http://www.iris.edu/hq/notifications -- Thank you to Bob Butler for passing on this resource