You can use this record if you decide to appeal the decision. But you don't have the right to a hearing for a minor punishment , such as being made to sit at the back of the class or detention. The only way you school can suspend or expel a student without notice or a hearing is if they think the student is a danger to other students or to school property. But even then, they're obligated by law to give the student notice and a hearing as soon as possible after the expulsion. Each year, more than 1.5 million students miss a day or more of school due to being suspended.
Most suspensions are for offenses such as cigarette smoking or truancy.
What your school can suspend you for depends on which state you live in. Most school officials consider that suspension is an extreme punishment , and they use it only as a last resort. Often, they don't suspend unless a student does something illegal, dangerous, or disruptive. The same thing goes for expulsion, although in a lot of states, expelling someone is illegal because everyone has the right to an education. And schools don't have the right to punish you if you broke a rule you had no reason to know even existed.