A person stands with his arms up in front of a white board and projected screen
A man in a vest is doing a presentation.
A man gives a lecture using a screen and whiteboard to emphasize his points.
a man speaking in front of a drawing board
A man wearing a vest standing in front of a whiteboard and a projector screen.¬
A man standing by the whiteboard teaching a class.
A Caucasian man with a mustache and goatee wears a brown shirt with a khaki vest and khaki pants  and motions with his hands in front of a white board and a large power point displayed on a screen.
A man is standing near a white board and large screen giving a presentation.
A man is holding up his hands in front of a screen and a white board.
A man giving a presentation to a class.