“…Becoming an expert in teaching has a rich theoretical basis (Clark & Peterson, ; Schemp, Manross, Tan, & Fincher, ; Shulman, ) that entails a shift from limited, context‐free, and in flexible thinking and doing to elaborated, situated, and flexible thinking and doing (Bransford, Brown, & Cocking, ; Dreyfus & Dreyfus, ). For example, Gearhart et al () defined assessment expertise as the “relationship between understandings of assessment concepts and facility with assessment” (p. 259) and used that construct to examine changes in teachers’ interpretation of student work. I also conceptualized assessment expertise as a relationship between assessment understanding and assessment facility.…”