Upper School Masterclass children thoroughly enjoyed being crime scene investigators for the day. They worked very hard, completing tasks that real crime scene investigators carry out. They started the day understanding the importance of the role of the CSI before moving on to their first experiment. They learnt how to capture fingerprints and analyse them, sorting them into different categories. From here they examined a crime scene, separating different compounds to find evidence; using magnetic traces, sieving and filtering to identify an unknown substance. After lunch they began working on DNA extraction. The children learnt what DNA was and how the police use it to solve crimes. From here they set up an experiment to separate the DNA strands of a strawberry. The children were then able to demonstrate their learning to parents before being presented with their certificates.