Dr. Yager has been awarded a fellowship to conduct research and professional development activities under the mentorship of Dr. Samuel Nyarko at Indiana University, Indianapolis. This project advances research in geoscience education. The capacity to work in teams and having effective teamwork skills are essential in the STEM workforce, and especially in geosciences - a field highly reliant on collaborative fieldwork. Furthermore, the vision and change for the future of geoscience education is that all students should have the knowledge and skills to work in teams, and almost every STEM job advertisement lists teamwork skills as part of the position requirements. Thus, around 98% of geoscience field courses in the United States rely on teamwork as a core teaching and learning strategy, and 88% of geoscience faculty use teamwork strategy at least once in their courses. Most STEM job advertisements list teamwork skills as a position requirement, yet students rarely receive instruction on how to work in teams. This study will design and implement teamwork intervention lessons to connect teamwork skills and fieldwork to investigate how these teamwork lessons impact students learning in both science concepts and teamwork process skills. This project aims to (1) design and implement teamwork intervention lessons for geoscience students that makes explicit connection of teamwork skills to fieldwork, lab, and classroom activities and (2) evaluate the impact of the intervention on