Describes the methods explorers throughout history have used to find their way by land, sea, and sky. Interest Level: 3-6 Reading Level: 7.7 ATOS Book Level: 7.9 AR Interest Level: MG AR Points: 4 AR Quiz: 144691EN Reading Counts Level: 10.6 Reading Counts Points: 7 Lexile Measure: 1120 Fountas & Pinnell: Y.