Survival for public school teachers goes beyond curriculum design, discipline and other skills. School law is critical for teachers to face the areas of challenge that are currently present. There are two types of common legal mistakes made by teachers: a) failing to take disciplinary action when they should, and b) unintentionally violating students rights. Social media, religion, the rights of transgender students and the possibility of teachers right to carry a weapon are all within the realm of rapidly changing public school law. Teachers should stay well-informed, so they are ready to protect students and their own constitutional freedoms.