This article examines the role and pedagogical implications of supportive assessment strategies at the interface where curriculum, general "Didaktik" and pedagogy meet; theoretically, the article draws upon concepts from research in each of those domains. This interplay is examined in relation to the performance-orientation on two curricular levels: on the programmatic curriculum level, Sweden is used as an example for a result-oriented curricular assessment context. On the enacted curriculum level, a high-performing class in year 8 in a Swedish compulsory school is chosen as a concrete case. Methodologically, the study represents a classroom case study. The empirical data corpus has been collected during one school year and consists of video-recorded lesson observations in the subjects of Swedish and science, semi-structured interviews with teachers and students, and field notes and teaching artefacts in the form of teaching documents. The results show that the supportive assessment strategies used in this classroom context can be understood as a kind of catalyst for the curricular performance orientation, where the effective achievement of externally set up outcome expectations is the purpose. Finally, this is critically discussed, among others, in relation to a "bildungs"-oriented understanding of education.