Protractor
From Tardis Wiki, the free Doctor Who reference
A protractor was a mathematical instrument used in schools. According to Susan Foreman's diary, Francis Minto shoved a protractor into Gillian Roberts's buttocks in mid-March 1963, and she destroyed her desk in rage. Mr Grange strapped her three times across the palm of her hand for vandalising school property. (PROSE: Time and Relative)
