Project-based curriculum ideas. Search for informational websites by grade or subject. Great reference tools. Curriculum for all major topics. A filtered educational search tool by Encyclopedia Britannica with educational sites broken into categories, reviewed, and rated.
Maps are printable.
Website of the largest association devoted solely to social studies education. Provides an extensive list of plans, including graphics and photos. Geography lessons and activities for all grade levels. Classroom activities are categorized by subject, geographic themes, and geography standards. A great site with reproducible copies of primary documents from the National Archives of the United States.