Accents are not for comic relief anymore; they root the character to the place they're from.
Information is available freely on the Net, but what's missing is passion. And only a teacher can impart that passion and deep desire for excellence every day. Moreover, a classroom environment helps overcome certain psychological aspects, including inferiority complex.
For example, Taj Mahal is the first thing which comes to the minds of many foreigners who visit India, and how Eiffel Tower in Paris, but there is lot more to every country.
I like fractured characters with human follies.
Cinema is about transferring thought into action.