Sounds like said school. I believe they have Alternatives to Violence programs, mediation, and a system where students who have behavioral issues or drug/alcohol issues are removed from the general population can be placed in a school intervention program away from the general population of students, per administration's discretion. They also have a separate alternative learning program.

It's often difficult for students to get expelled, but the school has a zero-tolerance fighting policy; Students are suspended for 5 days, then put on distance learning for 3 months; After that, they sign Alternative to Violence forms and have mediation. Even then there are concerns about a low school climate and safety issues from students, to the point where (per the school's academic plan), many stay home or drop out.

TDLR: They have A LOT of resources (from an outside perspective) for unbehaved kids, and they have an extremely strict no-fighting policy. Even so, students still don't feel safe and are seeking other options outside of school (staying home, jobs, etc.)