Keira Knightley did some extra homework to prepare for her latest outing in 'The Children's Hour', a theatre production in London's West End.

To prepare for her role, she decided to spend a day and teach kids at the Essex Brentwood School. This helped the actress get a feel for the environment of teaching and improve her understanding of her own character.

Knightley stars in 'The Children's Hour' alongside actress Elisabeth Moss which is playing at the London Comedy Theatre.

Made famous in 'Bend It Like Beckham', the British star is best known for her role as Elizabeth Swan in 'Pirates of the Caribbean' starring Johnny Depp and Orlando Bloom.

Keira Knightley in Pirates Of The Caribbean 2003