Suggested Student Assessment: Have students create their own quizzes to have classmates locate mystery places using the OMC Input Form. Extending the Lesson: Divide the class into small groups, and have each group use an atlas to create an activity similar to Crack the Code to give to another group. They should make sure that they use real places that can be identified in the atlas. Have them list the coordinates on one page and the place names on another page. The page with the place names will serve as the answer key. Related Links: NASA: Latitude and Longitude NIMA: GEONet Names Server National Geographic: Xpeditions Activity—Crack the Code Online Map Creation (OMC) Input Form