My thoughts are alike: why don't the parents change the school? All public schools are bad, but some of them are better than the others. I know that they both are probably working, so they can't teach at home and therefore homeschooling is barely an option. Of course, if you really want, you can find a way.
This kid sounds really clever, it's sad that he needs to live in this enviroment...
English is not my native language.