SHOPPERS at Morrisons at Waterloo were surprised to find a science class.
Students from Shelley College and Scissett Middle School set up a series of scientific experiments at the supermarket.
The students, from Years 9 and 10, used their science skills to perform acidity tests on soft drinks and shampoos, create an `erupting volcano', brew some `alien blood' and blow giant bubbles.
The students were helped by the college's resident researcher, Paul Cooper, who is studying for a PhD in chemistry at Manchester University.
The unusual exhibition was the brainchild of Debbie Lumb, assistant head of Shelley College.
She is in charge of its specialist science college status.
She said: "I wanted to communicate science to the public.
"It was the first time I had done anything like it, but we had a really good reaction."
She added: "Lots of people - from senior citizens to mums with children and people in their late teens and 20s - asked us what we were doing.
"We were really pleased and I will do it again next year.
"I'm hoping we can get other schools involved," said Ms Lumb.