A safer solution is to leave religion out of the public schools. What you are proposing may seem constructive to you, but it would be seized upon as an opportunity to get a foot in the door and begin proselytizing.
Mutual tolerance does not require knowing one another's beliefs and customs - just a willingness to tolerate other hard-working, peace-loving and law-abiding members of society whatever their beliefs and rituals, and would leave learning about such things to interested people using their own resources. Surf the Internet, take an extension or university course, buy a book, or go visit an ashram or Scientology center if interested.
My point is that mutual tolerance does not require mutual understanding of one's religious traditions. I am an American expat living in the very Catholic country of Mexico, which is an alien form of Christianity to me. Their Christmas, for example, is about baby Jesus, not Santa, and Palm Sunday and the Passion plays are very public demonstrations of the local religious culture, foreign to me, but which I enjoy and have even participated in. I've followed Jesus into Jerusalem while carrying a sword fashioned from a palm frond, walking over flower petals all the way.
And at Christmas, we watch Joseph and Mary wandering from door to door to find a place to spend the night, being sent away repeatedly before finally being received every year by the Mexican family across the street from us, when a party begins and children swat at pinatas.
I'm not hostile to any of that. In fact, my house is filled with religious art representing many traditions. I just don't want to make any of that part of the public school curriculum. It's not necessary for mutual tolerance, and specific knowledge of who believes what is of little value to the uninterested.