The problem with school now is parents are way to decoupled from their kids performance. No one is going to stand up in public and directly and blatantly tell parents, many of whom are single mothers and/or minorities (and hence, total PC language and tone must be used, else the city gets sued for "mental trauma"), 'The reason your kids are doing poorly is simply because you suck at parenting, and/or, your kid is an idiot'.
You can't take the average kid who's being ignored at home and whose parents don't give a F, is surrounded by other kids in the same situation, whose acedemic lives are jokes, whose priorities have school being the least important thing they're paying attention to, and then expect teachers to magically make these kids learn at the levels they're supposed to. At the %'s it needs to work at, it's never worked, it does not work, and it never will work.
Rather than throwing more money at teachers who are already making plenty, it'd be better to just setup some vocational training for kids so they know how to swing a hammer, weld, do plumbing, maybe work on HVAC, do electrical, etc.
At least then they'll have a chance competing with the illegals/Mexicans who they'll be competing with in the job market.
Chuck
P.S. The Chicago teachers union is insane, haha...