I think the line "send it home and make 'em study fixing teeth" refers to how many immigrant parents from "third-world" countries push their children to become doctors/dentists and engineers, so they can make a lot of money and lead better lives than their parents did.
I think the line "send it home and make 'em study fixing teeth" refers to how many immigrant parents from "third-world" countries push their children to become doctors/dentists and engineers, so they can make a lot of money and lead better lives than their parents did.