Energy is what makes things move, light up, and radiate warmth—energy makes things happen and makes our lives easier, too. But despite the importance of energy to every aspect of our lives, many Americans are not adequately armed with the basic energy knowledge to make informed decisions or determine what can be done to manage and conserve energy resources. In this article, the authors attempt to provide teachers with some basic energy information. Energy is indeed “fuel for thought” and will continue to be so for many years to come.