market failure (private, external, social benefits; private, external, social costs; third parties)

Simple market failure poster for iGCSE and iAlevel revision/summary (private, external, social benefits; private, external, social costs; third parties)
I enlarge page1 to A3, give students and they mark the various benefits and costs on the poster. obviously there can be valid arguments for what person/image is a external benefit or cost. By, hey, encourages class discussion.
Please use and review.