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This set of instructional materials was developed through a partnership between TERC in Cambridge MA, and the Cary Institute for Ecosystem Studies in Millbrook NY, funded by grants from the National Science Foundation.

TERC is a not-for-profit education research and development organization. For the last 48 years, TERC has focused on innovative and technology-rich advancements in math and science learning and teaching. TERC works at the frontiers of theory and practice to contribute to a deeper understanding of learning and teaching; enhance instruction through teacher professional development; develop applications of new technologies to education; create curricula and other products; and support reform in both school and informal settings.