Links for Teachers
Scientific American Frontiers Resources
Chapter 1. History of Life on Earth
Chapter 2. Classification
Timelines in Science
Chapter 3. Population Dynamics
Matching Finch Beaks to Food
Response to Environmental Change
Writing and Solving Proportions
Percents and Fractions
Finding the Mean
There is a wealth of information on the Internet, but sometimes the information you need can be hard to find. Explore and learn more by using the preselected links below.
New Insect Species
Copyright © 1995-2008 Houghton Mifflin Harcourt Publishing Company. All rights reserved.