The revived interest in the notion of 'evaluative judgement' in higher education is motivated by commitment of researchers and practitioners to effectively implement learning-oriented assessment and cultivate this high-order cognitive ability to develop students' capacity for self-regulated learning. Recent studies have examined the affordances and constraints of using exemplars to develop students' evaluative judgement in the fields of Education, Nutrition, Biology, and English for Academic Purposes. The present study, which focuses on use of exemplars in IELTS, analyzes patterns of teacher-students dialogues and 129 university students' perceptions of using exemplars to develop their understanding of assessment standards of IELTS academic writing tasks. Qualitative data were collected through an online questionnaire, individual semi-structured interviews, and workshop observations. Findings suggest that the IELTS instructor/researcher utilized various interactive strategies to develop students' hard, soft, and dynamic dimensions of evaluative judgement. Students identified affordances and limitations of using exemplars for language test preparation. Implications related to dialogic exemplar use to develop students' evaluative judgement are discussed in light of the findings.