Seawytch
Information isnt Advocacy
Some schools have forbidden religious displays in schools, not Christian displays. It is part of their dress code. Are you objecting to dress codes?Where have you been recently.
Schools are forbidding Christians to wear a cross or any form of Christian display to school.
My children attend a small public school in very liberal Northern California and I have seen plenty of teachers and students wearing their religious adornments around their necks. Our school's dress code does not forbid such displays. If you have a problem in your school, take it up with the board and have them change their dress code.
Probably because it constitutes publicly led prayer.Just recently a student sued because the school forbid her to say a prayer at her graduation speech.
On June 24th 1992, the Supreme Court ruled 5-4 that prayers during school graduation violate the Establishment Clause.
Anti Christianity is popping up all over the place throughout this nation.

Do you have ANY links for these things you are alleging?You are not able to bring a bible to many schools,many have not been able to pray outside of the schools before classes start let during lunch.
Teaching one religions belief as fact, as in a creationism class, is doing exactly that.Who said anything about preaching during classes?
Teaching our U.S. History has been severely limited because so much of it has God in it.
Care to give even a single example of this?