This article describes the ways opportunities and constraints in online mathematics teacher education (OMTE) and the authors' view of learning encouraged a deeper consideration of the role of environment in their teaching practice. Central to this discussion are the authors' values and the understandings mathematics teacher educators (MTEs) bring to OMTE and the conflicts between understandings of the online environment and views of learning that undergirded the instructional activities created. This article focuses on the MTEs’ development as teachers in online environments.