Students review the study of living things and make connections back to Earth's systems. This unit focuses on how various species, grouped in populations and communities, work with the nonliving things around them to ensure survival.

[Free Registration/Login may be required to access all resource tools.] Introduction to ecosystems and other ecological concepts.

What is good, bad, and next for large dams in the United States? Examine biological and ecological, sociological and cultural, legal and political, and economic effects of building a dam.

Click on the roulette wheel and see how some alien species were introduced into the United States and the effect they have had on our country. This is part of an archived Smithsonian exhibit.

A network of information about rare and endangered species and threatened ecosystems. The goal is to provide the scientific basis for conservation action. Also includes an online database of information on the plants, animals, and...

[Free Registration/Login Required] The abcteach directory contains sample pages from their pond unit for non-members. Handouts are in PDF format.

The Adopt-A-Pond Program was created by the Toronto Zoo for teachers looking for a guide to wetland issues and resources.

This NY Regents prep site provides a nice overview of what abiotic and biotic factors of an ecosystem are, as well as a brief description of carrying capacity.

Bridge, the Ocean Sciences Education Teacher Resource Center, is a growing collection of on-line marine education resources. It provides educators with accurate, useful, content-correct and content-current marine and data information on...