How can you show professionalism in school?

You can show professionalism in school through various ways. One way would be to on time to your classes and if not early because in reality being early is being on time, being on time is late and being late is just a way of saying I have no excuse.Another way is to pick up after other peoples work, if you see that there is work to be done or textbooks to be collected, there isn't a reason why you can't pick where they left off and get the job done. Make sure to have yourself be presentable, if a shirt needs to be tucked in then tuck it in, most likely nothing too revealing. Also if you have your own work that needs to be done, you should finish it the day your working on it  and not save it for the next day.