Monsters guide readers through the use of various math skills in a movie theater, demonstrating how to calculate the perimeter of the set, the area of the movie screen, and the volume of a popcorn box. Interest Level: 3-6 Reading Level: 4.0 ATOS Book Level: 4.3 AR Interest Level: LG AR Points: .5 AR Quiz: 149749EN Reading Counts Level: 4.5 Reading Counts Points: 3 Lexile Measure: 740 Guided Reading Level: O.