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http://www.project2061.org/publications/bsl/online/bolintro.htm

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• Benchmarks On-Line (Science K-12, some Math) MUST SEE
  A long-term American Association for the Advancement of Science initiative to advance literacy in Science, Mathematics, and Technology. A comprehensive project to develop essential curriculum for K-12, including some Social Studies themes. Enduring understandings are identified for the essential content.
  By jgordon in Curriculum Development > Examples of Understandings/Big Ideas: Many with Curr. Dev. Examples with content curriculm ideas instruction understandings

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