To Teachers:

This tour of phytoplankton and protoplankton provides information, images, and ideas that we hope will be useful as you teach biology. As you know, maintaining good water quality is essential for humans and Earth's biodiversity. We all depend on the next generation to conserve water and its valuable lifeforms. If you have some comments or suggestions that might make this tour more useful, you can contact us at lkgraham@wisc.edu

To Students:

As you look at the water of a lake or stream, you may see fish, water plants, insects and other relatively large creatures. But did you know that there is also a world of tiny organisms in natural waters that can only be seen with use of a microscope? We hope this site will help you learn to use a microscope to see this amazing zoo and garden of tiny creatures. They are all important to the ecology of the Earth.