DISCRIMINATION—School authorities may not discriminate against religious activity or speech.
BIBLE READING AND PRAYER—Students may read their Bibles or other scriptures, say a prayer before meals, and pray before tests.
DISCUSSIONS—Students may attempt to persuade their peers concerning religious topics, just as they may political topics. Harassment, however, (which is not defined) is not permissible.
SCHOOL WORK—Students may use religious themes in their homework, artwork, or other assignments, and such work should be judged (graded) by ordinary academic standards.
LITERATURE—Students have the right to distribute religious literature (tracts, etc.) to their schoolmates on the same terms as they are permitted to distribute other literature.
RELIGIOUS OBJECTIONS—Students may be excused from lessons that are objectionable on religious or other conscientious grounds.
CLOTHING—Students may wear clothing depicting religious themes, and these messages may not be singled out for suppression. They are subject to the same rules as apply to comparable messages.
CHRISTIAN GROUPS—Students religious groups at public secondary schools have the same right of access to school facilities as is enjoyed by other comparable student groups.
STUDENT MEETINGS—Student meetings may include a prayer service, Bible reading, or other worship exercise.
ACCESS—Students may use the public address system, the school newspaper, and the school bulletin board to announce their meetings, on the same terms as other student groups. (This only applies to schools receiving federal funds.)
GRADUATION PRAYER—School officials may not mandate or organize prayer at graduation ceremonies, nor organize baccalaureate services.
TEACHING—Schools may teach about religion, including the Bible or other scripture, the history of religion, the Bible-as-literature, and the role of religion in the United States and other countries. Schools are to be neutral with respect to religion. However, they may play an active role with respect to teaching civic values and virtue, and the moral code that holds us together as a community. Schools may not allow religious instruction by outsiders on school premises during the school day. However, school officials may dismiss students to off-premises religious instruction.
SCHOOL OFFICIALS—School officials, as representatives of the state, may not solicit or encourage religious activity, nor participate in such activity with the students.
The only exception would be my previous Global teacher, who was happy to discuss spiritual matters and allowed his students to do so as well. He's a good guy.
I have noticed what you're talking about. It's frustrating 
