RL3 Hillarious story about teachers plot to misteach all students on apple island.
Teachers come from apple island. some of the teachers are plotting to teach students incorrect information. someone has to save the kids.
This was one of my son's favorite books in grade school.

From back:
Teachers come from Apple Island, of course. They spend their days making crayons from the wax mines, picking paper from trees, and climbing on the monkey bars at the biggest playground in the universe. But some of the teachers on Apple Island are busy doing something else: hatching a plot called Project Misteach aimed at teaching students of the world incorrect information.
When Bradley gets wind of the teachers' plan, he knows he has to do something to help. But it's going to be pretty hard once he and his classmates are taken on a surprise field trip-to Apple Island! Can Bradley escape, save his friends, and put an end to Project Misteach?
Teachers come from Apple Island, of course. They spend their days making crayons from the wax mines, picking paper from trees, and climbing on the monkey bars at the biggest playground in the universe. But some of the teachers on Apple Island are busy doing something else: hatching a plot called Project Misteach aimed at teaching students of the world incorrect information.
When Bradley gets wind of the teachers' plan, he knows he has to do something to help. But it's going to be pretty hard once he and his classmates are taken on a surprise field trip-to Apple Island! Can Bradley escape, save his friends, and put an end to Project Misteach?