A critical issue in educator preparation is how to ascertain if program graduates are sufficiently prepared to be effective through the acquisition of meaningful evidence of graduates' impact on their students. Challenges to proving specific impact of educator-preparation programs on student learning include identifying and following program completers as they move into diverse teaching environments. Barriers include lack of access to measures such as students' achievement scores and work samples. This article puts the research on educator-preparation-program accountability into perspective and provides a discussion about whether or not we have the capacity at this moment in time to access meaningful data about and proof of teacher impact.