It's misleading to say this "air conditioner" costs nothing.  Still, the principle of cooling air by compression is valid.  Take a look!

Mesmerizing  Rube Goldberg machine with magnets and marbles.  Watch!!

Super slow-motion video of 142-mile per hour tennis serve.

Another  "perpetual motion machine"?  Take a look and decide for yourself.

Super slow-motion video of baseball hitting steel.

The Properties of Energy  Socrative Quiz is now active.     Press the button, then click on "student login" and type in the teacher room code:  519073.  

Super slow-motion video of golf ball hitting steel.

Another National Science Foundation video--this one explaining the physics of snowboarding.  Paul Doherty, of the amazing Exploratorium in San Francisco, helps explain the forces acting on the snow boarders.

This video shows the basics of a brand new lighting technology.  In remote African communities, much lightning is done by burning kerosene.  This brings with it dangers of fires and breathing unhealthy fumes.  Gravity Light would seem to solve these problems.

Have I created the world's first "perpetual motion machine" despite the laws of physics saying it is impossible??  Take a look and decide for yourself.

Great website to explore matter, energy, and subatomic partices.  Includes games, video, and questions and answers.

This is another great science simulation where you can examine the relationship between kinetic, potential, and thermal (heat) energy.

Was the ball hit to third for an out actually a foul ball?  Let's see what the infrared camera reveals!

Another really clever ad by Honda. This one shows a series of energy transfers using Honda parts.

This TED-Ed video provides a good overview of energy.  "Energy" is a huge idea in science, but can be difficult for students to explain in their own words.

Other Cool Resources:

Flipped Learning Videos:

Fundamental Goals, Outlines, and Quizlet:

                  Properties of Energy