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www.nasm.si.edu/gps - Cached
This link has been bookmarked by 7 people . It was first bookmarked on 30 Mar 2008, by Dean Shareski.
geocaching
Explains how GPS works and how we use it.
gps science technology
use for friday have kids use to create a brochure for a business which sells gps systems for cars. (publisher or construction paper)
Geocaching
gps Geocaching
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