QUICK, What's the most dangerous thing in the world!? Most students guess sharks, car crashes, or wild animals… but the real answer surprises them. Diseases kill millions of people every year, and this lesson helps students understand why.
 
This Google Slides health lesson introduces middle school students to infectious and noninfectious diseases while exploring how the body protects itself. Students will learn how the immune system fights invaders, how lifestyle and genetics influence disease risk, and what habits actually help prevent illness.
 
Here’s the breakdown:
 
Start with a quick hook that gets students guessing the most dangerous thing in the world before revealing the surprising answer. Then students follow along with the worksheet as the lesson breaks down what a disease is and the two major categories: infectious and noninfectious.
 
Next, students explore how the immune system works, including the body’s first, second, and third lines of defense. A short video and movement activity help students understand how everyday behaviors like hygiene, vaccination, and healthy habits help prevent infections.
 
After that, students shift to the big picture of health and disease risk. They explore factors inside and outside their control, including genetics, lifestyle, environment, and access to healthcare.
 
Finish strong with a group research activity. Students analyze character profiles and investigate diseases such as high cholesterol, high blood pressure, type 2 diabetes, lung disease, and colon cancer. Using credible sources like the WHO and CDC, they recommend realistic lifestyle habits that could help reduce each character’s risk.
 
What’s included:
NHES-aligned lesson plan
18 editable Google Slides to guide the lesson
Follow-along student worksheet
Group research activity with character profiles
Prevention and lifestyle analysis activity using credible health sources