Quote 1
"It makes me vomit," she went on, "to think that I am going to have to put up with a load of garbage like you in my school for the next six years. I can see that I'm going to have to expel as many of you as possible as soon as possible to save myself from going round the bend." (13.7)
Unlike Miss Honey (and Mrs. Phelps, too), the Trunchbull is pretty much the worst teacher Shmoop can imagine. She sees a school as a place made worse by kids, rather than as a place designed to nurture them. Can you imagine if your principal called kids vomitous? Or garbage? Can you spell fired?
Quote 2
"[…] My idea of a perfect school, Miss Honey, is one that has no children in it at all. One of these days I shall start up a school like that. I think it will be very successful." (14.3)
Here, we get a handle on what a bad educator the Trunchbull is. She thinks the best school will be one with no kids. None. Of course this is hilarious, because the idea itself makes absolutely zero sense. A school with no students isn't a school at all. It's just an empty building. And what, in the world, is the point of that?
Quote 3
"…I have discovered, Miss Honey, during my long career as a teacher that a bad girl is a far more dangerous creature than a bad boy. What's more, they're much harder to squash. Squashing a bad girl is like trying to squash a bluebottle. You bang down on it and the darn thing isn't there. Nasty dirty things, little girls are. Glad I never was one." (8.11)
How can the Trunchbull have never been a little girl? She's female, right, and she can't have been born at six feet tall and giant-size. And although she calls little girls nasty and hard to squash, we know that these adjectives apply to her just as much. She's the one who's awful and can't be squashed. And she squashes little girls all the time. Just look at poor Amanda Thripp.