Most of OCSB schools are filled with non-Catholics, atheists, “baptized pagans” (ie. Catholics in Name Only CINO), etc. Most classrooms of 30 only have 1 or 2 at most that attend Sunday mass.
Here is an example of an new Immaculata atheist student. The guidance counselor was nice enough to reassure them that “MAC” isn’t really Catholic anyways – just about being “nice”.
“The guidance counselor reassured us that there were families of all sorts at Immaculata. The religion courses that Middle would be taking would be mostly about how to be a good person and would not be overtly Catholic in nature.“