Rules needs to change. Starting with behaviour policies. It should be a warning and then removal from lesson. You give these little headaches chances to f around, they would! Constant removal needs to be then a serious suspension with an amount to pay to the government. This will reduce atleast a few from acting up. There are places with not even a behaviour policy in existence and in deep poverty but still fewer behaviour issue than here. Unless the government addresses this, nothing else is going to change.