Key Stage 4 Teaching Resources Students aged 14-16 years build on their learnings around useful and harmful microbes; hand, respiratory, and food hygiene; sexually transmitted infections, vaccinations, and antibiotics. Lesson plans are designed to complement the National Curriculum for Key Stage 4. Download the complete lesson Micro-organisms Introduction to Microbes 50 /ks4-intro-to-microbes /ks4-intro-to-microbes Micro-organisms Useful Microbes 50 /ks4-useful-microbes /ks4-useful-microbes Micro-organisms ...