|Written by||Mark Hoffmeier|
|Directed by||Armand Garabidian|
|First aired||September 20, 1995|
|Episode number||Season 3
|Previous episode||Passing the Lantern|
|Next episode||Fourth Down and Long|
|Series||Mighty Morphin Power Rangers|
Rocky is not happy that he has been chosen to participate in the “Teacher for a Day” program and must change places with Mr. Wilton, the hard-nosed science teacher. While Rocky teaches science class, Mr. Wilton tries to fit in as a teenager. Both sides of the experiment prove disastrous. Rito and Zedd decide to get involved and turn Mr. Wilton into “MARVO THE MEANIE,” a horrible monster. The teens morph into action, trying to subdue their teacher. “Marvo the Meanie” liquidates all of the Rangers except for Rocky. Rocky takes the liquidated Rangers back to the Command Center and uses his experience as a science teacher to return them to human form. Rito and Zedd enlarge Marvo, but the Rangers call on the Ninja Megafalconzord to defeat Marvo and restore Mr. Wilton to normal.