"The child would flunk if he/she did not participate. If one chooses not to attend a graduation ceremony, that individual still graduates. They just get their diploma some other way."
So you're OK with the High Schools in Dearborn, MI holding their graduations in mosques and reciting prayers to allah fubar --- you know, because the ceremony is "voluntary."
Just making sure you're consistent.
Show me in the article ANYWHERE where it said there would be prayer offered up during the graduation ceremony. Or are you making a poor analogy again? (The latter, of course.)
A building is just a building. Hold it in a mosque, no big deal. Personally offended by being in a mosque? Don't go.
the ceremony is "voluntary."
Not just "voluntary" but completely voluntary.