Proseletyzing in Public Schools

Would you, as a parent, allow your child to join in to an Islamic prayer?  What if, on a school-sponsored field trip, your child spent several hours in a mosque,  being indoctrinated in Muslim "history" and overtly proselytized by Muslim leaders?  Where is the ACLU on this?  Where are YOU?
This is where your tax dollars are going:

http://www.youtube.com/watch?v=Z7-I9Qp3d4Y&feature=player_embedded