Having male and female pupils (2-2)

I believe the answer is:

co-ed

(Other definitions for co-ed that I've seen before include "Teaching both girls and boys" , "School for boys and girls, in short" , "Teaching attended by both sexes" , "School for both sexes" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.