Prudence Crandall was an American schoolteacher and activist. She ran the Canterbury Female Boarding School in Canterbury, Connecticut, which became the first school for black girls in the United States.

The Canterbury Female Boarding School, in Canterbury, Connecticut, was operated by its founder, Prudence Crandall, from 1831 to 1834. When townspeople would not allow African-American girls to enroll, Crandall decided to turn it into a school for African-American girls only, the first such in the United States. The Connecticut legislature passed a law against it, and Crandall was arrested and spent a night in jail, bringing national publicity. Community violence forced Crandall to close the school.