Getting expelled from school is not very easy to do and is the last punishment that the school gives you so it may take awhile to get expelled from school.
But if you want to get expelled from school you need to be constantly disobedient to the teachers or principal or constantly disorderly in the classroom.
Don't harm anyone because that could get you expelled but also get you in jail and a bad record on file.
Just constantly disobey the teachers and principals and act out in class and eventually if you do that enough you'll get expelled but at first you may only get suspended from school or just sent to the principals office but you have to keep at it for it to work.