What's in the Bathroom Air?

This lesson plan is written for 7th grade science but can be modified to be used with any age group. Students will create petri dishes and will collect samples from bathrooms. Students will then identify what specimens are found in the bathrooms. 

Objectives:
Today we will discuss “germs”.
At the end of our investigation:
We will learn what we mean when we talk about germs.
We will learn how germs can travel across far distances.
We will learn what allows germs to grow, and what can kill them.
We will learn about how germs get inside of us and how they can be harmful to people.
We will discuss ways in which we can reduce the spread of germs and try to develop a way to make the things we use every day safer for us.