everybody already gave good advice and kinra touched this subject.the kids you have to get the teacher to control the kids.to reduce stress on the snake get the kids to sit at their desks quietly as you speak and only have one at a time come up to the snake so its a little bit more intimate and you have more control of whats going on around your snake.im new to the snake game but kids i know quite well.if there isnt discipline in that class with the snake their going to be bouncing everywhere and getting grabby.unless the kids are all well mannered lil buggers.read the kids as they approach your precious and as they interact with the snake.my nieces are timid when it comes to handling mine.10yr old and 14yr old.they both wanna hold my bp but once shes in their hands they get scared and want to drop her because shes moving in their hands.i make my nieces sit down when handling and to learn to trust my bp.they are getting better and never dropped because im there reading my nieces body language.its a good thing to expose people to reptiles at a young age so they dont get that snakes are satan mentality.whatever you choose take your time and organize it well.
good luck.