“Engineering Challenge for the 21st Century,” a weeklong teacher workshop sponsored by the National Science Foundation, uses project-based learning (PBL) to help students and teachers build science, technology, engineering, and math (STEM) skills. The workshop, hosted by the U.S. Coast Guard Academy in New London, Connecticut, features the Coast Guard Academy Robotics on Water (CGAROW) project. The goal of CGAROW is to stimulate teamwork, foster creativity, encourage strategic planning, and develop practical scientific and engineering aptitude while building robotic crafts. This article describes the teacher workshop, the CGAROW project, and its application to the classroom.