International audienceIn this paper we introduce a link between the Theory of Didactical Situations and the Documentational Approach to Didactics, in order to study teaching/learning phenomena at the beginning of university mathematics studies. Specifically, we investigate the didactic contract at three levels: institutional, mathematical subject, and specific mathematical content level, and link it to the use of resources by students. Using this link, we analyse data stemming from two complementary case studies: one in the UK, and one in France. We identify didactic contract rules at the three levels for the students, and for the teachers. Moreover, we find discrepancies between students’ and teachers’ rules, and also between those and the...