Polly's investigation
Have a look at this. Its the first of the 7N pupils' holiday task. Its a great start but what do we think about the reliability of her conclusion? Has she shown us that it was a fair test? Brilliant work Polly  and just the sort of fun thing that we should be looking at the science of but I think we might like to know a little more detail before we can submit this to "The New Scientist" or "Nature".
Keep up the good work.
IRP