### Teaching Systems of Equations through Geocaching

Using GPS units, or mobile Apps, students work their way through a multi-cache of 3 waypoints, solving systems as they go to find their next clue.

#### Setup

Obtain a GPS or Mobile App

Locate X number of cache locations in Decimal Degrees.

2 caches = 2 groups
3 caches = 6 groups
4 caches = 24 groups
X caches = X! groups

#### Pre-Teaching:

Latitude and Longitude

Decimal Degrees

https://en.wikipedia.org/wiki/Decimal_degrees
Note that we need to use 6 decimal places for accuracy of this activity.

The App

Setting up the app for this activity requires a couple of steps.

• Tap once on the screen and look to the bottom right corner for the "i" button to access Settings
• Select Setings from the pop-up menu
• Look for Geo coordinates and change that to the last of the options (±D.x 51.499400° -0.1222759°) to use Decimal Degrees
• Tap "Done" at the bottom
• Keep scrolling down to the Maps section and ensure that the first three sliders are set to on (Green)
• Tap "Done" at the bottom

#### Send students out

Using the App

Here are a few steps to make the experience less open ended.

• Hand out the first clue in class and have students enter the coordinates as a location in the app
• Tap once on the display and look for the flag icon (second from the bottom right)
• Select Manage Destinations from the pop up menu
• Select New Destination then Location
• Give your location a name and enter the Latitude (x) and Longitude (y) coordinates from the solution to your System of Equations.
• Tap "Save" at the bottom, then "Done"