Nobody took this seriously until these kids got killed. These shootings are the one thing that has galvanized people. It makes it impossible for people to offer the usual explanations. It blows up in people's faces the idealization of suburban white America. The fact is that people have not focused on how to improve education all the way through school.
All official wisdom is that it's too late.
They are pseudo-adults, and we don't know what to do. Now it's better not to fix it, let it go. Accept the original idea that the compulsory system is adequate for childhood and the transition years. The secondary system would end at age 15 or 16. You would provide an opportunity for young people to keep going to school, or pursue a public-service option, special interests, or vocational training.