This document discusses the use of exemplars to help students understand assessment. It provides context on a case study where exemplars were used with trainee science teachers. There are several dilemmas in using exemplars, such as whether to directly tell students about quality or have them construct it themselves, and balancing time for student discussion versus teacher input. The case study highlights strategies for managing these dilemmas, such as highlighting valued qualities like creativity, consolidating student insights, and building shared understandings. Ultimately, the use of exemplars can enhance students' understanding of goals and standards if implemented well through strategies like these.