Do the Americans speak English better than the British?

<<"My teacher taught me americans are very ignorant so I don't know if they can speak a language well " >>

It sounds like the teacher is very stupid. Her (or his) statement would fail the most basic rules of logic.

<<Who cares about insignificant countries like those? It's better not to where they are. That way you have less useless information clogging your brain. >>

Lack of geographic knowledge is part of the US American stereotype. In contrast, I assume most Europeans, Latin Americans, Asians, etc. are up to snuff on their Pacific island chains and West African countries.