Perhaps your boys were a bit worried about how they might look in front of their mates. Spirituality is so much about opening oneself up and admitting vulnerability that I imagine it would be hard to do in a school environment.

I really don’t think I could do what you do – to walk into a school full of strangers (at least many of them you wouldn’t know) and talk about something so personal. A bit like casting pearls before swine perhaps? But then again, I’m sure there are plenty of students who show an interest if not publically in class.