This project contains data files supporting research conducted in Sweden. Teachers were surveyed in 2021 and 2023 for repeated modeling. A report on the project will be published in the Scandinavian Journal of Educational Research in 2025 with the following doi: http://dx.doi.org/10.1080/00313831.2025.2468183 The instruments are Swedish translations of the Teacher Conceptions of Assessment (Brown, 2003) and the Teachers Conceptions of Feedback (Harris & Brown, 2008).Brown, G. T. L. (2003). Teachers' conceptions of assessment inventory-Abridged (TCoA Version 3A) [Measurement instrument]. figshare. Auckland, NZ: University of Auckland. https://doi.org/10.17608/k6.auckland.3199543.v1Harris, L. R., & Brown, G. T. (2008). Teachers' Conceptions of Feedback inventory (TCoF) [Measurement instrument]. Auckland, NZ: University of Auckland, Measuring Teachers’ Assessment Practices (MTAP) Project. https://doi.org/10.17608/k6.auckland.4800901.v1Earlier studies have established the Swedish version of the TCoF (Brown et al, 2023a) and the TCoA (Brown et al., 2024), which is under review at a journal. These data demonstrate that the model linking TCoA factors to TCoF factors was statistically invariant across the two times of administration. The results also show that TCoF completely mediates the relationship of TCoA factors and formative feedback practices.Brown, G. T. L., Andersson, C., Winberg, M., & Palm, T. (2023). Predicting formative feedback practices: Improving learning and minimising a tendency to ignore feedback. Frontiers in Education, 8(1241998). https://doi.org/10.3389/feduc.2023.1241998Brown, G. T. L., Andersson, C., Winberg, M., Palmberg, B., & Palm, T. (2024). Swedish Teacher Conceptions of Assessment. Figshare preprint. The University of Auckland. https://doi.org/10.17608/k6.auckland.22426657.v1The data file is an SPSS .sav file. The analysis is file is an AMOS .amw file. The image file depicts the relationship of the TCoA to TCoF and feedback practices.