Cameras in our classrooms

My petition is to have cameras installed into the classrooms. I have realized that sometimes we dont know what goes on behind the doors of our childrens classes. Therefore, by having cameras in our schools will not only protect our teachers, but also our childrens rights. We dont know who is telling the truth behind those closed doors. What better way to know is what is going on than with a camera? I know many will disagree with this idea ,because the classes will have their privacy invaded. However, when is our privacy not invaded? Every time we go to the store, bank, park, on school buses, and more places. By having a camera in our school classrooms will help protect the teacher and student rights at school no matter what the situation may be.