When George and Harold hypnotize their principal into thinking that he is the superhero Captain Underpants, he leads them to the lair of the nefarious Dr. Diaper, where they must defeat his evil robot henchmen. Includes CD Interest Level: 3-6 Reading Level: 4.2 ATOS Book Level: 4.3 AR Interest Level: MG AR Points: 1 AR Quiz: 20251EN Reading Counts Level: 3.5 Reading Counts Points: 3 Lexile Measure: 720 Guided Reading Level: P. Teaching Books: https://school.teachingbooks.net/tb.cgi?tid=10680.