Year 6 have all passed their O.W.L's (Ordinary Wizarding Levels) during our Harry Potter themed experiments today at Rayner Stephens High School.  We have looked at chemical reactions caused by mixing bicarbonate of soda and vinegar and we have looked at the density of liquids. The children have had a really enjoyable day and used lots of scientific knowledge in their predictions and conclusions. I am really impressed with their efforts.