Discuss lice Show students the head of a small straight pin. One of a group of lice is called a louse. One louse is the size of the head of the pin.
Lice like to live in people's hair, and they like to have very big families.
They also like to move from one person's head to another. Demonstrate how lice spread Tell students to picture how a louse, as small as the head of a pin, would get from one student to another. Have two volunteers stand in front of the class. It would be a lot of walking for lice to get from one person's head to another. Lice don't fly, so they need to get a ride to another head.