Jeffrey Choppin teaches courses in the mathematics education program and a doctoral course on learning theory and is a principal investigator (PI) on National Science Foundation (NSF) projects. Two of his NSF-funded research projects focuses on mathematics coaching in rural contexts. The projects employed three-part fully online professional development models, including online courses, demonstration lessons or video clubs, and one-on-one coaching support. Another project focused on a sustained implementation of an ambitious mathematics program in a high-need context. Choppin previously worked on a project that explored teachers’ understanding and use of curriculum materials in states that adopted the Common Core Standards for Mathematics. That study found that conventional curricula narrowed the forms of mathematical activity in classrooms compared to classrooms in which more innovative materials were in use. That work also began Choppin’s foray into the study of digital curriculum and theorizing how teachers take up curriculum materials.