Alison Sood's 11.1 biology class at Houghton Kepier school, Tyne and Wear, wins this week's box of Dubble bars. They're back at school after work experience and getting stuck into hard work before their mocks. Alison says many of them want Fairtrade chocolate supplied in the canteen. "This may be the incentive the head needs." If your class deserves a treat, email email@example.com to tell us why, giving the name of your school and marking your message Dubble offer. For information on fair trade, go to www.dubble.co.uk.