Knock it off!
Stop doing something., Quit doing something.
"Please knock it off! You will hurt yourself if you are not careful."
Success Tips For Students
Staying organized in school is extremely important. If you are organized, then you are one step ahead in being successful. Keep a folder for each subject, that means that you put your math papers in your math folder, your Language Arts papers in your Language Arts folder, your science papers in your science folder, and so on. To make this easier, use color codes or label your folders.