Practicum poses great challenges for pre-service teachers who learn to assess because their conceptions of assessment (CoAs) may undergo dramatic changes. This multiple-case study reports on how three pre-service teachers' CoA changed over practicum at a primary school in China. Findings show that pre-service teachers' CoAs have experienced a rapid change from a superficial perception of assessment for academic achievement and moral character development to a more comprehensive understanding of varied assessment purposes, constructs in assessment criteria, feedback, fairness in classroom assessment, and students' involvement in and engagement with assessment. A range of factors are found to have exerted varying degrees of influence on these conception changes, such as personal factor (i.e., agency in assessment), experiential factors [i.e., school-based assessment practices, interactions with students, and (anti-)apprenticeship of observation about assessment], and contextual factors (i.e., mentoring, classroom reality, school assessment culture, and national assessment policy). These findings are discussed in terms of how these changes are diverse but limited, as well as how the mediating factors have exerted differentiated influences in positive or negative ways. This paper concludes with implications for research on teachers' CoAs and professional development for assessment literacy.

While prior research suggests that teachers’ conceptions of assessment (CoA) are influenced by their personal characteristics, experiences, and specific sociocultural contexts, how these factors influence teachers’ CoA is still underexplored. This narrative study explores what teachers’ CoA are, as well as how influential factors mediate their CoA by drawing on data from narrative frames with 48 high school EFL teachers in China. Findings reveal that teachers commonly endorsed the improvement-oriented purpose of assessment. A range of factors is found to have exerted influences to different degrees on these conceptions, including personal factors (i.e., teachers’ agency in assessment), experiential factors [i.e., (anti-)apprenticeship of observation about assessment], and contextual factors (i.e., exam-oriented culture). These findings are discussed in terms of how teachers negotiate the improvement- and accountability-oriented purposes of assessment, as well as how teachers’ CoA are shaped by teacher agency, emotional experiences as assessees, and the exam-oriented culture. This paper concludes with implications for research on teachers’ CoA and policy, practice, and professional development of teacher assessment literacy.