In Kindergarten classrooms the bathroom is adjoining. Of course, the fifth grade students might have interrupted the teaching of the class in the middle of the day to make an en-masse visitation.
Afterall, who really knows, huh?
That would also "bring up more questions."
It brings up the question why we have government run schools in the first place. They teach kids how to roll a condom on a bannana instead of teaching math and wonder about problems with bad behavior.