Ann-Marie Buchmann completed her Master of Science in Mathematics in March 2023 and was a member of the Mathematics and its Didactics research group from June 2024 to February 2025. She now works at SV SparkassenVersicherung in Stuttgart.
Armin Fabian completed his doctorate in the Mathematics and its Didactics research group in 2024. His dissertation is titled Modeling, Measuring and Fostering (Pre-Service) Teachers’ Professional Knowledge to Integrate Technologies in Mathematics Education. He is now working as a postdoctoral researcher at the Hector Research Institute of Education Sciences and Psychology on the ALIFE project, where he contributes to the development and evaluation of adaptive, innovative online professional development programs for teachers. (website).
Judith Havemann completed her doctorate in the Mathematics Education research group in March 2026. As part of her doctoral research, she developed and evaluated the course “The World of Patterns – Discovering Mathematical Structures,” designed to support highly gifted children at the Hector Children’s Academies.
Her dissertation is titled Promoting Mathematical Structuring Competence: Design and Evaluation of an Enrichment Course to Foster Mathematical Talent.
She is now working as a lecturer in the primary teacher education program at RWTH Aachen University.
Xenia Stein completed her doctorate in this research group between November 2022 and December 2025. Working at the intersection of mathematics education and empirical educational research, she regularly moved between the two fields – and between the hill and valley locations of the Hector Research Institute of Education Sciences and Psychology (HIB).
For her doctoral project, she developed an asynchronous online course designed to introduce mathematically gifted primary school children to the art of mathematical proof. The course is part of the program offered by the Hector Children’s Academies and was piloted with this particular target group in summer 2023. After developing a corresponding assessment instrument, the course was implemented several times on a larger scale via the Hector Children’s Academies’ Moodle platform to investigate whether and to what extent it improved children’s mathematical proof competencies.
The results were published in her dissertation, A Digital Approach to Talent Development With Mathematical Proof. Xenia Stein is currently completing her teacher traineeship at a secondary school in Tübingen.
