* A school of fish: This is the most common collective noun, but it refers to a group of fish, not a school building.
* A body of students: This is a formal way to refer to a group of students, but it's not a specific collective noun.
* A class of students: This refers to a group of students taking the same course.
* A faculty of teachers: This refers to the group of teachers at a school.
* A staff of employees: This refers to all the employees at a school, including teachers, administrators, and support staff.
Ultimately, the best way to refer to a school as a collective noun depends on the specific context.