If you are a resident artist, the teacher is legally bound to
supervise the class, unless you are also a certified teacher. I get the
impression that they are not doing this.
Second, when students act inappropriately, take away their materials,
move them away from others, do what ever it takes to publicly make it
clear that their behavior is not acceptable in your presence. You are
correct, sending them to the office is ineffective... having to draw on
a piece of newspaper with a pink crayon might make them appreciate a
real paper and pencil.
Kayenta Intermediate School