Whether we cry during a sad movie, while chopping onions, or completely involuntarily, our eyes are constantly producing tears. This learning module tracks a particularly watery day in the life of Iris (the iris) as she cycles through...

This resource provides complete, mini-learning modules about different aspects of the human body. Click on the eyeball to focus your search.

Read about an art project in which an artist is using his own tears and a microscope to create works of art.

Gives examples of chemical interactions occurring in the human body, in the world around us, in foods, and in products we use.

In this lesson, young scholars learn about the structure and function of the human eye and research how it compares to animal eyes. They will then choose an eye, write a description, and make an illustration of it, which other students...