"Leave your underpants alone." Said to children when PE was in vest and pants.
"VGI." = very good indeed.
"Take those shoes OFF!" This was a punishment for kicking, or playing with shoes, especially Velcro ones.
"Are you deaf, daft, or disobedient?"
"Anyone who talks, in. (greedily) I want to see a child staying in." This was a dinner lady daring any child to talk on the way to the playground.
"I don't understand why birthday children give out sweets; surely it should be the other way round."
"Oh dear, what a lot of naughty children having to miss their play!" There was a carpet outside the staff room for children condemned to this fate.
A truly terrifying threat: "...or I'll be cross!!!!" Never "angry" for some reason.
My favourite infant school teacher wasn't "cross" very often, but when she was, she used to punctuate tellings-off not by pointing, but grabbing the child's wrist and shaking it, occasionally dragging the child around if she was really cross. When she did this to me once (I was probably fidgeting; I got told off a lot for that), I cheerfully retorted "stop pulling my nice jumper". Fortunately she liked me enough not to go really mad!
"Oh, you're all so good-looking." I was an adult when I heard a teacher cooing this over the year 5 class photos, (she used the word "lovely" a lot), when I volunteered in a primary school. "Ask the lovely Wanderings to use the glue gun on that for you." None of my primary teachers were like that; most of them were very brisk and businesslike, but I noticed they were often a bit "softer" when there were visitors.