Students solve four math puzzles and use the numbers for GPS at a site like Google Maps. Once they locate the place in the world, they are given part of the clue. Solve all seven sets and a complete message is decoded.
I am a third generation public school teacher who has been in education since 1987. I have taught elementary students full time for 20+ years. I am also a freelance curriculum writer. You can contact me at mrs.mjbauer(at)gmail(dot)com.