Schools have a duty to adequately supervise their students, and they will be liable for foreseeable injuries proximately related to the lack of adequate supervision. However, schools are not insurers of their students' safety. A school bus operator owes the same duty to the students entrusted to its care and custody. To establish a breach of the duty of adequate supervision where the alleged injury was caused by another student, a plaintiff must show that school authorities had sufficiently specific knowledge or notice of the alleged dangerous conduct.
Champagne v. Lonero Tr., Inc., NY Slip Op 03959 (2d Dep't June 6, 2018)
Here is the decision.