What are 16-year-olds supposed to learn by making posters?

My niece, Lara, 15, has a mind like a surgical blade. On any subject, from calculus to The X Factor, she finds the heart of the issue and dissects it with alarming ease. Lara makes mincemeat of homework, trailing A grades, which is why it was so odd to find her stumped two weeks ago. The trouble was with her English language GCSE. As part of her coursework (controlled assessment) she had to comment on a pamphlet, produced by a charity, about volunteering.

On the cover of the pamphlet was a slogan in a pink circle, and Lara’s dilemma was this. She said: I’ll get points if I write that the circle symbolises something, an unbroken ring of trust, or the fullness of life. But I mean, the truth is, someone at the charity just chose a circle at random, didn’t they? So what should I say? Then she looked me in the eye.