2B was one of the classes at Coal Hill School. Clara Oswald once took them for an art lesson, but it did not go well. During the Twelfth Doctor's imprisonment in the Prison, the students decorated a placard with "FREE THE DOCTOR" and numerous handprints using paint.
Clara's outgoing voicemail message was, "Hi, it's Clara. I'm either banging my head against a brick wall trying to teach Class 2B Shakespeare, or, y'know, out saving the universe." (COMIC: Clara Oswald and the School of Death)