Still has got many meaning, hence I would advise you a link about
:
Cambridge Dictionaries Online - Cambridge University Press
Though, the main meaning of
still may be
always and again. Eg He is still here. He is always and again here.
A second meaning of
still might be
though in the commencement of a sentence.
Ei Still, he got out after a while.
Though, he got out after a while.
Not a teacher at all.