i'm not a teacher, but IMO a BP might not be the best display snake for a classroom. it will be in it's hide more often than not and being handled by dozens of kids may really stress it out. how old is your snake BTW? i think the younger and less experience it has with humans will make it a more difficult snake/classroom pet.

my 4th grade teacher had a corn snake which was very active. it was fun watching him throughout the day slither around and climb and eat!