Lolita is in no way controversial.
It should be taught in every school, just like many other great books should be. Most children aren't idiots, we shouldn't try to censor them as if they are. That said of course it should be somewhat age appropiate - 14/15 year olds, not 6/7 year olds.
Why no sound of tap, tap, tapping? The Ravens at the keyboard: napping!