Within a sociocultural framework, we use situated learning theory to explore the use of a coteaching approach during student teaching. Coteaching is a model for learning to teach where clinical educators and teacher candidates teach alongside one another and share responsibility for pupil learning. Teacher education programs have adopted this model for student teaching because there is evidence that coteaching supports pupil learning and coteacher learning. This study of coteaching in three teacher education programs, within the same university, examined opportunities afforded for teacher candidates' development of growth competence, adaptive teaching expertise, and collaborative expertise. Data analysis from the nested, cross-case qualitative study enabled us to examine opportunities for candidate learning afforded by coteaching during student teaching, posit recommendations on using coteaching, explain the necessary conditions, and discuss the model's current limitations.