World Atlas is an educational resource for world maps, atlases, and in-depth geography information. Teachers and students: free maps of Europe, USA, Canada, Florida, Caribbean Islands and much more.
This World Atlas, in addition to have many maps at a variety of scales as is very common these days, has the added feature of embedding facts and other informative features based on your scale and regional context. Students can explore this at their own pace to learn about what every region of the world that interests them the most.
Via Seth Dixon