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Subtracting Integers

August 30, 2012

Subtracting Integers

A short but quick one. When I was a kid, no one ever told me about the little trick of turning a negative into a positive.

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Gary Johnston: Gary is a 20 year educator who has worked in International Schools in Thailand, Vietnam, South Korea and now Peru. While in Asia, he was a frequent presenter at regional conferences such as the Vietnam Tech Conference, 21st Century Learning, Learning 2.0 and the Google Apps events. Now in South America, Gary serves as an innovation coach and design teacher at Colegio Franklin Delano Roosevelt International School. He also serves as a coach for school site mentors in the South American AMISA conference and regional liaison for the 'World Virtual Schools Project' supported by the US state department.

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