Archaeologists set up a grid system that can be used to map a site as well as record the location of the artifacts and features found at a site. Various tools are used to establish a grid including a compass. In this exercise, students will become familiar with using a compass and how it can be used to create a grid. They will learn about orienteering and taking compass bearings. Students will also learn how archaeologists use Euclidean geometry to square a grid and calculate distances within and between sites.