During the last lesson before Christmas, I took the opportunity to try something new and designed a science classroom challenge for Y8 pupils. Using what they had learned they had to unlock puzzles and crack codes, find elements on the periodic table display and use them to calculate a three digit code. The first ten students got a prize. The pupils were animated, helping each other to figure it out. The classroom had a fantastic buzz and every conversation I passed was filled with science and reasoning. It was a fantastic way to end recap the unit and I would like to do something similar with each unit in the future.