KS4: Useful Microbes In this lesson plan, students use the story of insulin to learn how microbes can be useful. Scroll down for more information and to download resources. Download the complete lesson Understand that some microbes can keep us healthy Understand that some microbes can be put to good use Understand that we need bacterial colonisation to live a healthy life Understand that we need to protect our normal microbial flora Begin to explore scientific research Understand that microbes are importa...