Principals need support, not only in their early years, but throughout their careers. Support and encouragement can come from networks of principals who meet regularly to share problems and solutions and reflect on their practice....

Leadership preparation begins with early and meaningful opportunities for teachers to lead. The traditional span of control in schools with one principal supervising scores of teachers is outdated and no longer functional. Distributed...

President Franklin Roosevelt's second inaugural address delivered in 1937. In this speech FDR calls for the nation to accept and prepare to move forward.

Dwight Eisenhower's Vice President, Richard Nixon, came under fire for misusing political contributions for personal expenses. These are transcripts of Nixon's speech delivered in 1952.

In this interactive activity, from the Web site developed for the PBS series "Building Big," think like an engineer and use your knowledge of dome design to match the right type of dome to the right location in a fictitious city.

This video segment adapted from NASA describes the basic characteristics of our star, the Sun. Includes background reading material and discussion questions. Video length: 1 min. 28 sec.

Explore a few of the ways plants pollinate each other in this video segment from Sexual Encounters of a Floral Kind.

This image from Biology by Kenneth R. Miller and Joseph Levine illustrates the five most important parts of a seed: the seed coat, the endosperm, and the embryo's primary root, cotyledon, and embryonic leaves.

This image from Biology by Kenneth R. Miller and Joseph Levine illustrates the relationship between structure and function by comparing the jaws and teeth of two animals with very different ways of life: the wolf and the horse.

In this interactive periodic table from the NOVA Web site, find out the role of various elements in making fireworks.

Build a circuit, set up your machines, and run your fidget factory.

Do you like to build and create new things? Check out this collection of 48 different engineering activities providing opportunities for creative building using things around the house. These include activities like spinning, rubber band...

What can you build with things around the house? Select what you would like to make, click on three items you have and want to use, and click on the spinner to get ideas and instructions.

Students were challenged to create something powered by rubber bands. Check out the winners and runner ups. Can you recreate theirs or create one of your own?

This challenge is to design and build a sturdy emergency shelter that can fit one person and easy to build. Are you up to the challenge?

Can you build a blimp (airship) that travels in a straight path across the room? Give this one a try.

This challenge requires you to design and build a device that can pass above a surface and detect magnetic fields.

This challenge is to design and build a headphone system to hear a musical instrument (real or homemade) better. Can you do it?

This challenge is to design and build a tool that can take a core sample from the center of a potato. Are you up to it?

Can you build a blimp that hovers, and then modify it to use balloon power to travel in a straight path across the room? Try it!

Your job is to design and build a ping-pong carrier and send it down a zip line in 4 seconds or less. Are you up to the task?

This challenge is to design and build a cushion system that can safely land an egg dropped onto the floor from three feet up. Are you up to the challenge?

Can you make a balloon hover in one spot and move without you touching it when you create air currents? Give it a try!

Can you build a rubber band-powered, paddle boat that paddles across the water? Give this a try and have a paddle race with a friend.