Uwe Gellert is a Professor of Mathematics Education in the Faculty of Education and Psychology at the Freie Universität, Berlin. His research interests include social inequalities in mathematics education, cross-cultural studies, microanalysis of classroom interaction, sociological perspectives on mathematics, and mathematics teacher education.
Christine Knipping is Professor of Mathematics Education at the Faculty of Mathematics and Computer Science at the University of Bremen. Her research interests include argumentation and proving, discursive and interactional mechanisms in mathematics classrooms, sociological perspectives on stratification in school and international comparisons.
Hauke Straehler-Pohl is a post-doctoral researcher in Sociology of Education and Mathematics Education in the Faculty of Education and Psychology at the Freie Universität, Berlin. His research interests include social inequalities in the school system, sociology of (pedagogic) evaluation, documentary method, performative approaches to school mathematics, and mathematics teacher education.