Looks like we're gonna seque into a discussion about abortion. If a child attends a Catholic school, and abortion is wrong according to Catholic teaching, why should they not instruct and involve the children?
I do not ask my children if they feel "informed" enough to attend church, eat their vegetables, do their homework, etc. They are children, and a parent has the inherent right to mold them as they see fit.
I have no right to challenge your decisions (abuse notwithstanding) and vice versa.
I do hope you are just as indignant about sex ed in the public schools as you are about those children being involved in a protest. Part of being a Catholic, or lots of other faiths for that matter, means trying to influence/witness to others for the good. If a Catholic believes pro-life to be the good, then of course that is what they will stand for. I'm sure plenty of children are at NOW rallies as well.
Children are under their parents' authority until they are 18, and then they have the freedom to do as they see fit.
As for where I went to Catholic school: the northeast. A religion class was not about why Catholicism was right, true, etc. It covered many of the worlds religions. While it is necessary to know there is a world that has many beliefs and customs, my parents expected my Catholic school to teach me how to defend and live my faith. It did not.
BTW-I did qualify my earlier statement saying that I could not make judgements about the local schools.