The U. S. Supreme Court specifically forbids public school students to be released from school for any religious activities t/f

That is very true. They believe that religion and school should not be mixed. Not including prayers among the sports team mates and coaches, but not in front of the "audience".

Unless, you attend a religious school. For example, many Catholic schools teach children more about religion than the subjects taught in public schools.

Perhaps, the U. S. S. C does this to avoid issues amongst the students and their different religions.