Mr. Johnson is the English teacher for the smart freshmen or the stupid sophomores. He introduced Ivy DeLore to Collin Wilson and put them in a group with Johnny King. He was given a bigger part in Airplanes Pt. 4, giving Johnny some advice, making him more of a friend to the students then a teacher.
But others, like Kenny McCromick don't like Mr. Johnson's class beacuse they made them write stories, but that is why Ivy DeLore loves it.