How do you measure the impact of a champions program? This was the central question of a working session at CZI’s Accelerating Open Science in Latin America workshop, convened by rOpenSci’s Community Manager Yani Bellini Saibene and attended by CSCCE’s Founder and Director, Lou Woodley. Measuring the impact of any kind of community program presents a series of challenges: What is the impact that you’re hoping your program will have?