Is It a Factual Difference on Coercion?

In the coach kennedy, yap. case, we now have the supreme court precedent that you have set in theCoach kennedy case, and now it's a junior high coach. He's praying by himself on the 50 yard line. The students are allowed to join if they want, and the majority of the students are choosing to join him. At what point is it coercive? Is it their age? Is it the number of students joining? Where's the line why? I know that a silent, 15 second prayer by himself is not coercie, but that's not my question. We were very surprised at i guess my point is that you can go down as long