Greg James and Bella Mackie didn’t pay much attention at school. So they’re asking Britain’s most inspiring teachers to show them what they missed in this series of fascinating and fun lessons.

This week it's biology with Dr Monks, who teaches Greg and Bella why we get ill. The lesson reveals what a germ actually is, the pivotal role pubs have played in keeping us safe, and discusses why it could be important to stick your fingers in dog poo.

Bad students of all ages are welcome. Expect brilliant teachers, captivating subjects but absolutely no homework.

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