Through the Open Culture blog I just learned that more than 80,000 of Albert Einstein's documents and drawings are now available to view for free at Einstein Archives Online. The archives include not only his scientific work but also his images and documents from his travels and thoughts on the world in general.
Applications for Education
I haven't had much time to look at the Einstein Archives yet (I'm boarding a plane in two minutes), but I think that it has the potential to be a great resource for science, math, and history teachers who their students to research the development of Einstein's ideas over the course of his life. After I get more time to browse the archives, I'll update this post.