Jake Sherman is an [[OrdinaryHighSchoolStudent Ordinary Middle School Student]], who is condemned to help his Mr. Dirksen, his grouchy science teacher, finish his experiment as part of a routine detention. However, when [[LightningCanDoAnything lightning]] strikes the house, Jake gets knocked out, and wakes up in his teacher's body. After that, his middle school life is pretty much doomed to [[HilarityEnsues wackiness and hilarity.]]

Written between 1994 and 2001 by Todd Strasser, the series achieved some popularity, but was largely overshadowed by the monumental popularity of series like ''Literature/{{Animorphs}}'' and ''Literature/{{Goosebumps}}''.
!!This series provides examples of:

* BluffTheImpostor: Jessica (Jake's sister) tries a blending of these tropes on Jake and Mr. Dirksen, to see which is which. Finally, she asks Jake a trick question to see if it's really him, and he answers it correctly.
* FreakyFridayFlip: All but two of the books. Usually it's Jake, but occasionally his friends Andy and Josh get in on the action.
** Jake himself ends up in the bodies of Mr. Dirksen (his science teacher), the President, ''his sister'', a dog, his uber-muscled gym teacher, a movie star, an alien, [[ChristmasEpisode Santa Claus]]...
* FridgeLogic: In-universe, a case happens to Jake. When he gets stuck in his dog's body, he dreads eating dog food, mainly because he thinks the food contains chicken lips. As he's about to be discovered by his sister, he quickly thinks "Do chickens even ''have'' lips?"
* GroundhogDayLoop: If it's not a FreakyFridayFlip, it's this. Only happened twice though; once in the first day of school, and in the first day of summer camp.
** In the first one, it introduces some ''very'' important recurring characters, and a massive amounts of CharacterDevelopment. The second one, he helps the ButtMonkey gain confidence to stand up to a bunch of bullies, some character development that has [[AesopAmnesia already happened a few times,]] [[CrowningMomentOfFunny and finally remembers to brush his teeth after many repetitions]].
* HeroicBSOD: In ''Help! I'm Trapped in the First Day Of Summer Camp'', Jake suffers a mild case of this partway through the book. Without breaking away from his BSOD, he demands to be taken away from the camp (his parents would get the refund), and threatens his sister (she ate his doughnuts). All PlayedForLaughs.
* MundaneUtility: The body-swapping machine has enormous implications on the nature of intelligence, psychology, and the soul. Jake and his friends use it to spend a day as a celebrity, to keep Jake's dog out of obedience school, and to get the local bully expelled.
* ProtagonistCenteredMorality: Jake swings back and forth between a great guy, a JerkWithAHeartOfGold, and a straight-out {{Jerkass}}.
* ShipperOnDeck: In the first book, Jake actively ships for Mr. Dirksen and the hot teacher, Ms. Rogers.
* OutOfCharacterAlert: See BluffTheImpostor, above.
* SpotTheImpostor: See BluffTheImpostor, above.
* TagAlongActor: In ''Help! I'm Trapped in a Movie Star's Body'', the eponymous movie star tags along after the OrdinaryHighSchoolStudent protagonist.
* WhosOnFirst: In one book, Josh tries to get the local bully, Barry Dunn, expelled when he's in the principal's body. After their plans fail, the bully starts to gloat, and Josh interrupts "Are you done?" The bully responds with "Of course I'm Dunn," and continues to gloat. This happens two or three times before Dunn starts insulting Josh's intelligence. And Josh expelled him.