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Direct linkCooper, Linda; Dennis, Emily – Mathematics Teaching in the Middle School, 2016
More than 2,200 years ago, Eratosthenes, who was a Greek astronomer, geographer, and mathematician, used a simple proportion involving the distance between two ancient cities and measures of shadows cast in those cities during a summer solstice to estimate the circumference of Earth (Nicastro 2008, 25-28). Today, middle school students can use…
Descriptors: Computation, Computer Oriented Programs, Telecommunications, Handheld Devices
