Friday night and the lights are low, so entice your colleagues to Sing-a-long-a Abba, where lashings of Lycra, blonde wigs and platforms are the order of the day (that’s in the audience). Friday readers can book four or more tickets for Thursday to Sunday shows at the Whitehall Theatre for pound;10 each (standard price pound;22.50, usual group rate pound;15). Tel: 020 7369 1735 and quote Times Educational Supplement offer. More about the celebration of Sweden’s finest at www.singalonga.com.

At the Dubble

Does your class deserve a treat, for working hard or making you laugh? Dubble, maker of the fair-trade chocolate bar backed by Comic Relief, is offering a box of chunky Dubble bars for a class nominated by a Friday reader every week this term. Just tell us why your kids deserve them: the most convincing answer wins. Email friday@tes.co.uk, marking your message Dubble offer. Visit www.dubble.co.uk for more information on fair trade and to sign up your pupils as Dubble agents - every agent receives a mission pack choc-full of fair-trade facts from cocoa bean to bar.

Take the biscuit

Fancy a breaktime treat for your staffroom, department or school office? Answer our quiz (think biscuit for one of the answers) and you could win two tins of organic Duchy Originals.

1. What does vodka mean?

2. The art world changed forever on April 15, 1874, thanks to an event at 35 Boulevard des Capucines, Paris. What was it?

3. In Elizabethan times, what did waferers do to earn a crust?

4. Thongweed, dulse and serrated wrack are all types of?

5. Which famous bridge is nicknamed “the coathanger”?

January 10 answers: 1. Demotic; 2. A fork for pickles; 3. Cannabis; 4. Jammie Dodgers; 5. Six.

For Take the Biscuit email: friday@tes.co.uk by January 23. First out of the hat will take the biscuits - supplied by Duchy Originals. Teaching materials about organic food and farming - and the answer to one quiz question - are at www.duchyoriginals.com.If you don’t have email, send us a postcard, with the name of the offer and your address to: Tracey Thomas, Friday magazine, 66-68 East Smithfield, London E1W 1BX