This chapter presents a case study on Algal Biofuels using the discovery engineering process. In this lesson, students learn about the discovery of algae as a biofuel. They build algae skimmers to capture algae and analyze it under a microscope. Afterward, they examine a variety of biofuels and different species of algae being tested as sources of biofuel. Last, students will produce their own designs for developing algal biofuels and present the designs to the class. This lesson may be taught in a unit on energy and ecosystems. A list of materials, teacher background information, teacher notes, references, resources, assessments, and standards are provided. This book selection also includes the Table of Contents, About the Authors, Acknowledgments, Introduction, and Index.