Go Social Studies Go has been around awhile, but has recently redesigned its site. It has resources for U.S. History, World History, Geography and World Religions, and is probably accessible to high-Intermediate English Language Learners and above.
The site is attractively laid-out and fairly extensive. There aren’t many other sites out there that have such broad coverage of social studies topics and that are as accessible.
I’d say it’s definitely a site Social Studies teachers would want to bookmark….