The Santa Fe Institute (SFI) Undergraduate Complexity Research (UCR) program is a 10-week residential experience in complex systems science. Students develop and carry out an independent research project in collaboration with an SFI mentor and as a member of the supportive UCR community. Students learn how to combine theory, methods, and data from the physical, natural, and social sciences to ask big questions about real-world complex systems using the rigorous methods employed at SFI. Through a series of seminars and workshops, students enhance their skills as researchers and prepare for the next steps in their academic and professional journeys.