In contrast to a student’s nearly universal right to wear religious jewelry or clothing with religious messages in school, a teacher is more limited, particularly with respect to clothing choices. Generally, a school district may prohibit a teacher from wearing religious garb or clothing with religious messages in order to promote an atmosphere of neutrality about religion in the public school classroom. On the other hand, teachers may wear such religious jewelry as cross necklaces or angel pins in the classroom. The Christian Law Association (CLA) generally advises that if a jewelry item can be purchased at a department store jewelry counter, it may be worn since its use would not then be limited to religious purposes. Many “rock” stars who are not Christians like to wear cross jewelry on stage, for instance.
—Keeping Christ in America’s Public Schools, Gibbs & Gibbs, 2008