> To do this in a way that would be perceived as positive for all tracks, you'd need to put more resources towards the higher numbered tracks, and make it clear that's what's going on. Smaller class sizes / more instructional aides / better teachers go to the kids who need more help
The problem is the reasons kids end up in the bad classes are all different.
Some kids have a learning disability that requires individualized attention. You need more teachers for that, or more parental involvement.
Other kids have a different learning disability where the only thing they need is more time to do the same work. You can put them in a normal sized class with other students who work at the same pace and everything is fine.
Some kids have a bad home life and what you can do for them is to get them into after school programs so they have more time at school to do homework and interact with other students and less time at home where everything sucks. But in that case you don't need smaller classes, you need longer hours. More after school programs.
Some kids used to have a bad home life and now it's better, but the experience affected them and now they act out. What those kids need is counseling.
Some kids have been exposed to environmental toxins at home that predispose them to violent behavior. They needed prevention -- lead abatement etc. -- because once it has already happened they're pretty much totally screwed and there is not a lot the school can do about it.
All of these kids have to be separated from the other kids or they'll disrupt the class, but "pour money on those classes" doesn't fix most of it because most of the problems don't come from the classroom to begin with. The school can't fix the fact that some of their kids are living in apartments with lead paint, so spending money on smaller class sizes for kids with lead poisoning is a lot less effective than spending the money on lead abatement.
Problems in school generally have causes (and solutions) outside of school. Treating the classroom is treating the symptom.