Gone are the days when discipline meant a couple of licks with a leather strap or a paddling on your buttocks. Corporal punishment is simply unacceptable in 21st century America. Indeed it is illegal in twenty-six states. Discipline is something which is defined by and meted out according to the contract between you and the school.
The important concept to understand is that as a student in a private school you are governed by contract law, not constitutional law. In other words, you do not have the same rights as a public school student. If you violate the terms of your contract, you will be dealt with accordingly.
Many schools have 'zero tolerance' policies when it comes to capital offences involving substance abuse, cheating, stealing and sex. You need to take your school's code of conduct seriously and abide by it or face the consequences. These consequences could be as serious and final as expulsion from the school.