Times puzzle master Will Shortz has edited these crossword puzzles, which are grouped by topics such as American History, Fine Arts, Language Arts, Science, Technology. Each puzzle page has links to learning more about the topic. Explore the Hall of Geology, Gems, and Minerals extensive image database in combination with the Rocks and Minerals crossword.
"David Rumsey Historical Map Collection
The over 120 historical maps in the Google Maps Rumsey Historical Maps site have been selected by David Rumsey from his collection of more than 150,000 historical maps; in addition, there are a few maps from collections with which he collaborates. (more ...)
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All social science teachers should go through this approx. one hour tutorial, then get an hour of professional development for it- or whatever your district requires.