Go Social Studies Go is a great resource that I initially reviewed about eighteen months ago. This afternoon I received an update about it from its developer Kenneth Udhe. Go Social Studies Go has added more than 100 new topics since I first tried it out.

Go Social Studies Go is essentially a series of multimedia books about
common social studies topics. The site is divided into four main
sections; World Geography, World Religions, World History, and U.S. History. Within each section is a series of booklets containing
text, pictures, videos, and links to additional resources.

Applications for Education
Go Social Studies Go
could be an excellent resource for middle school social studies
teachers. For the topics covered, the multimedia booklets provide as
much content area information as you’ll see in a typical textbook. For
high school students, the multimedia booklets could be a good primer or
refresher on many topics.