Skip to main content

Science

Age 11-14 For teaching distillation in Year 7, the standard experiment involves distilling ink to get the water back, but I distil tea.

Simple. Take a tea bag and kettle and brew tea in a beaker - no milk or sugar - then ask pupils how to get the water back. They really don't know how but when you do ink they don't seem to find this a problem. You then distil the tea the usual way in a leibig condenser and hey presto - water!

The best bit is discussing whether or not you could add the water back to the residue and make tea. Yuk! You can talk about tannic acid and why coffee is OK kept hot but tea tastes foul. You can also talk about tannic acid in peat bogs preserving so-called bog bodies and the process of tanning leather (and tanning your stomach). I find the pupils are far more engaged with this than with distilling ink - and they remember it Carol Ashby-Rudd taught at Avonbourne School in Bournemouth until July and now works as head of education and youth work at the Tall Ships Youth Trust

Now it's your turn

Share your brilliant teaching idea with your colleagues on this page - and we'll pay you pound;50. Just send 150 words (plus details of a useful book or website), including your lesson's subject, target age group and your own name and school to features@tes.co.uk

Log in or register for FREE to continue reading.

It only takes a moment and you'll get access to more news, plus courses, jobs and teaching resources tailored to you