With support from the Institute of Museum and Library Services, the Mathematics in Zoos and Aquariums project worked with zoo and aquarium staff members to integrate mathematical concepts into the interpretation of living collections. Over two years, the project developed three activities related to logic, measurement, and data analysis and conducted workshops with over 400 staff from 124 institutions. In refining the workshop model and conducting evaluation, we found that most staff increased their comfort with and use of math-based activities and that the goals of the participants and the