Ok, In-School Suspension is not such a severe thing. It is more similar to a detention, but inside normal school hours and probably just for 1 or 2 days.
1. Students will be assigned to In-School Suspension and/or Detention for good and sufficient reasons including, but not limited to:
a. Behavior which adversely affects the safety and well being of other students;
b. Behavior which disrupts a class or school sponsored activity; or
c. Behavior prejudicial to good order, discipline, and safety occurring in class or school sponsored activities.
... so if the girl was told by the teacher "saying bless you is against classroom rules", whether stupid or not, and the girl started acting out against the teacher then this seems like a normal outcome.
