Zero tolerance means that there is no room for mistakes or bad behavior. It is like if you break a toy, you know that you will get in trouble because you were not supposed to break it. It is the same with rules in school or at work, if you break a rule, you will get in trouble because there is no excuse for not following the rules.
It is important to understand that zero tolerance rules are designed to keep everyone safe and create a fair and respectful environment. Sometimes, people can get hurt or upset when rules are broken, and it is important that everyone does their part to prevent that from happening.
So, if you hear someone talk about zero tolerance, it means that they are serious about enforcing rules and making sure that everyone is following them, no matter what.