In this paper, we will describe the challenges and insights gained from conducting professional development workshops aimed at helping faculty prepare materials to support the development of students' quantitative skills in different disciplinary contexts. We will examine some of the mistakes we made, and misconceptions we had, in conducting the workshops and describe how we adapted in successive years to improve the curriculum materials developed during the workshops. In particular, we will discuss how we encouraged faculty to focus on clarifying student learning goals and developing effective assessment. (Contains 1 footnote.)