It’s really basic stuff, but easy to forget. Teens need a place to belong, and something to belong too. And there is a period in there where it’s sometimes hard to fine. If they don’t find it in a productive and healthy place, it’s easy to find in a unhealthy place.
Kids hit a age where they feel they should be more independent then they are able too, where there is a gap in between being a “kid” and being able to work and gain independence. I think the best thing that can be done at this age is to keep them involved in something outside of school and to help them find a way to feel they bring value to something.