This web seminar provides an introduction to the Next Generation Science Standards, including the Practices, Disciplinary Core Ideas, and Crosscutting Concepts. The presenters chose lessons in an energy unit to show NGSS in action in a classroom. The lessons focus on how energy is transferred to produce light and sound using Energy Balls (http://www.teachersource.com/product/energy-ball/electricity-magnetism). The viewer is guided through the thinking of the fourth grade teacher as she plans lessons to help students explain the phenomenon of an electric circuit. Two guiding questions drive the investigations: How and why does the energy ball light up when you touch the sensors? How does the energy ball demonstrate energy transfer? After the Energy Balls have been introduced, students create initial models to explain how they work, then develop their explanations through a series of investigations. Teachers will find helpful ideas for eliciting student’s initial ideas, guiding discussions and investigations, and fostering curiosity. Although energy is the focus of the lessons in this presentation, the ideas are applicable to any area of science.