This document summarizes a study on dynamic assessment conducted with Iranian English language university instructors. The study investigated instructors' conceptualizations of dynamic assessment and how they apply it in practice. Semi-structured interviews, classroom observations, and a questionnaire were used to collect data. The results showed that instructors have a good understanding of dynamic assessment in theory, seeing it as process-oriented and beneficial for learning, but face challenges in practice due to assessment system priorities on summative exams over formative assessment. The duality of teachers' and institutional assessment criteria limits instructors' authority to fully implement dynamic assessment approaches.