PBS features a summary of the landmark Supreme Court case of Barron v. Baltimore which stated that the freedoms guaranteed by the Bill of Rights did not restrict the state governments. Decision written by Chief Justice John Marshall.

PBS features a summary of the landmark Supreme Court case of Gibbons v. Ogden which dealt with congressional powers through the Commerce Clause of Article I, Section 8. Decision written by Chief Justice John Marshall.

PBS features a summary of the landmark Supreme Court case of Dred Scott v. Sanford which ruled that African Americans are not American citizens, and therefore could not sue in federal court. Decision written by Chief Justice Roger B. Taney.

This site created by NatureWorks reveals the natural history of the Marbled Godwit, a North American shore bird. The content of this resource includes a look at this species' characteristics, range, habitat, diet, life cycle, and behavior.

Find out more about the Little Blue Heron through this educational resource. The content of this source includes information on behavior, characteristics, life cycle, diet, habitat and range.

Explore the lifestyle of the Pied-Billed Grebe when you check out this educational site. The content of this site features information on characteristics, range, life cycle, diet, habitat, and behavior of this aquatic bird.

This site created by NatureWorks focuses on the Common Snipe. The content of this resource includes a look at this species' characteristics, range, habitat, food, and more.

Help build perfectly shaped spaceships for all the farm animals so they can blast off into space.

How much do you think you know about trees? PBS site offers a video and description of the life cycle of trees and their leaves.

Can exercise really help our brain work better? This PBS site discovers if this is really true by taking you into the worlds of Jada and Maurna to find out.

PBS offers an experiment that kids can do at home to learn more about heat conduction and how it works.

This PBS Kids site teaches students about crystals and includes an activity that shows how to make sparkling gems at home.

How do leaves breathe? PBS site explores how plants breathe and sustain life.

How can you cut a rock without a saw? Is it possible? PBS site invites you to come along with Mike and Victor to find out.

This PBS kids site features dozens of short plays that have been performed on the children's television series "Zoom." Includes short scripts for skits which students can perform together, and lists of props to include in the performance.

See how much public education has changed from the one-room schoolhouse days of the frontier. From a companion essay to the PBS series, Frontier House.

Would you clean your plate if you had to eat what frontier families served in eastern Montana? Find out what's on the menu from this companion essay to the PBS series, Frontier House.

Making a house a home was a struggle on the plains. This companion essay to the PBS series, Frontier House, describes the problems with getting water, outhouses, and furnishing the sod house.

Have you ever seen a photograph of a bearded seal? Come and learn more about this fascinating mammals. Students will find information ranging from characteristics, diet, reproduction, habitat and more.

A close up picture providing an example of what a slave chain looks like. Click on Teacher's Guide for teacher resources.

Here is a brief article from PBS on the life and accomplishments of abolitionist Harriet Tubman, who risked her life on several occasions to ensure the freedom of others. Links to a teacher's guide and primary sources are provided.

Meet an activist who works to help the struggling farmers of rural India, in this video from Wide Angle. [2:30]

In this video segment from Cyberchase, Hacker has sabotaged another section of the Madre Bonita Express track; Digit gets help from Deci in adding decimals to find the right size rail that will repair the track.

Learn about the lives of gorillas born in captivity in this video segment from Nature. [8:21]