No Prep Sub Plans: Inventions in Medicine | Medical Breakthroughs Timeline Project | Grades 4–8 Explore the inventions that transformed human health and changed the world with this engaging research and group project! Students investigate major medical breakthroughs — from anesthesia and vaccines to X-rays, antibiotics, MRI technology, and mRNA vaccines — while building a visual timeline that tracks how medicine has evolved over time. This ready-to-use activity combines science, history, resear