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Map trails, find treasure caches, and solve problems by using a Global Positing System (GPS) with your students. GPS technology is made possible by twenty-four U.S. military satellites orbiting the earth that transmit signals to a receiver. This data provides the location and the current time for each of the satellites. The receiver calculates its position based on where the satellites intersect. Data from at least three satellites is necessary to find a two dimensional position and from four satellites for a three dimensional location.Build a foundation of knowledge with latitude and longitude concepts. Then, read about GPS and tap into some great lessons. Finally, hide treasure boxes around the schoolyard and have your students use GPS receivers to find them or take a field trip to locate a cache in your community. Learning about geography with GPS can lead your students to loads of cache.
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