Dr. Angela Hackett, Dr. Susama Chokesuwattanaskul and I were invited to teach year 3 about good bacteria/bad bacteria, good hygiene and the immune system, as part of their STEM week. We spent the morning with one class (3EM) and the afternoon with another class (3P).
A review of their week and other visitors can be viewed here:
http://www.stlukes-formby.co.uk/news/stem-week-challenge/25946
My two favourite photos below, include: Left, me demonstrating how viruses spread using glitter (and hence the importance of hand washing) and Right, counting how many "bacteria" the "neutrophils" had "eaten".