The Grosvenor Teacher Fellowship, administered by the National Geographic Society, is a professional development opportunity for pre-K–12 educators that centers on immersive, field-based learning. Fellows embark on expeditions aboard National Geographic-Lindblad vessels, engaging directly with the environments and cultures they study. This program reflects the Society's longstanding commitment to geographic education and experiential learning, positioning educators as frontline ambassadors of exploration and discovery. The fellowship is designed to transform teaching practice by providing educators with firsthand exposure to remote and ecologically significant regions. While the specific itinerary and duration vary, the core experience involves close interaction with naturalists, researchers, and local experts, fostering a deeper understanding of global interconnectedness. Fellows are expected to translate their expedition experiences into enhanced classroom curricula, thereby extending the impact of the program to students and communities. Selection is conducted by a jury of National Geographic staff and education professionals. The fellowship covers costs associated with the expedition, though applicants should consult official guidelines for details on travel, stipends, and expectations. The program seeks educators who demonstrate a commitment to geographic education, innovative teaching methods, and the ability to inspire students through real-world exploration.