(Strip Number 5013, Original Publication Date, 1 September 1988)
Panel 1: We find Pale Lawrence holding up a class schedule for Mike to look at so he can tell him how interesting (in a bad way) having five teachers (not counting home room and health class) is gonna be.
Panel 2: As he explains that now, they've got a separate teacher for math, history and so and so forth, looming giant silhouettes loom and do terrible things that rub our noses in the fact that they want to destroy the established order and force poor Elly to admit that she's terrible at this parenting thing like chew bubble gum and hold note books close to their chests.
Panel 3: Mike sets up the punchline by asking Pale Lawrence how come they got so many teachers in Junior High when in grade school, the home room teacher taught everything.
Panel 4: Rather than speculate as to the benefits of specialization, he gazes up at the giant teenaged mutant monsters and thinks that they think that there's safety in numbers.
Summary: This sort of "We have to kill teenagers before they kill us" crap seems to have been her reaction to the fact that her mother was actually right about adolescents being a handful. My guess is that Lynn thought that her mother was unusually incompetent on top of being heartless, cruel and wanting too much of her and didn't deal at all well with Aaron's rebellious phase.