Go Social Studies Go is a nice site developed by Kenneth Udhe, a social studies teacher in Michigan, for his students and the world. Go Social Studies Go is essentially a series of multimedia books about common social studies topics. The site is divided into three main sections; U.S. History, World History, and World Religions. Click to open a book then click to open a chapter in the each of the books. Within each chapter there is a series of pages containing text, pictures, videos, and links to additional resources on your chosen topic.
Applications for Education
Go Social Studies Go could be an excellent resource for middle school social studies teachers. For the topics covered, there is as much content area information as you'll see in a typical textbook plus your students can access multimedia elements for the topics they're reading about. For high school students, the Go Social Studies Go content offers a nice refresher on many topics.
Disclosure: Go Social Studies Go is currently an advertiser on Free Technology for Teachers. That said, I initially wrote about the site three years ago when I was using parts of it with my own students.