A compilation of the most illuminating and engaging moments of the Teaching Challenge series, as famous faces attempt to teach a lesson for the first time in their lives.
David Blunkett talks about blindness and poetic imagery, John Humphrys is tackled by pupils about his use of English, and Vanessa Feltz discusses family relationships with primary school pupils.
Madness singer Suggs returns to his old school - the subject of his hit Baggy Trousers - and helps a GCSE music class write and perform their own version of an irreverent school song.
And, to show how modern life is governed by numbers, Simon Singh brings a second world war Enigma machine into a GCSE maths class on codes and their uses.
