Tuck your shirt in, sit up straight, pay attention and listen to the teacher!
If those words sent a shiver down your spine, you were probably a bit of a scamp in school.
A Linthwaite school cracked down on pupils wearing the wrong trousers as the new school year began this week - triggering anger from parents.
School was the first place where we were told off by someone other than our mums and dads - and made to follow someone else's rules.
From no talking in assembly to making sure your school tie was a perfect Windsor knot, failing to do as you were told could result in detention, writing lines - or the dreaded cane!
Luckily the cane has been outlawed from classrooms now, but that doesn't mean kids these days get away with their high jinx.
We asked our readers on Facebook and Twitter to share their memories of school rules and punishments with us - how many of these applied at your school?
Click below to read some rules and punishments from your schooldays
How many school rules did you break? Did you dodge detention or did the teachers catch you out?
Tell us about the rules and punishments from your schooldays in the comments below.
Lots of youngsters donned their school uniforms for the first time this week as they began their primary education.