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[TOOL] http://www.historypin.com/ Video explanation here [CCSS Verb] ‘relevance” Engagement Explore a topic Document with evidence, Create and share knowledge [USE] 
This great new site is a mashable of GoogleEarth and Pinterest. Immediately I saw the value in connecting to real world problems, history to happenings and engagement. A must try.
Librarydoor: 7 Tools to Empower the Common Core
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