Lost at School, 1979. In the 70s, George Plemper took up a teaching post at Riverside school in Thamesmead, and he documented his students and surroundings, processing his photographs in his bathroom. The title reflected Plemper’s own feelings about working in the education system, but many took the title to be about the students themselves. After being exhibited as a Half Moon touring show, the photographs remained unseen for 30 years until Plemper uploaded them to Flickr.

Photograph: George Plemper