* The school may not have a policy against accessing game sites. Some schools allow students to access game sites as long as they do so responsibly and don't disrupt the learning environment.
* The school's filtering software may not be comprehensive enough to block all game sites. There are many different game sites on the internet, and it can be difficult for schools to keep up with all of them.
* The school's network may be configured to allow access to certain game sites. For example, a school might allow students to access educational game sites or sites that promote physical activity.
If you are a student, ask your teacher or school admin what the policy is on accessing game sites. If you are a parent, you can contact your child's school to ask about their policy.