- Algebra 1 (2WF13) en Verzamelingenleer en Algebra (2WF06) college voor Wiskundestudenten, gecombineerde Wiskunde/Informatica en Wiskunde/Natuurkunde studenten, en voor Minor Wiskunde studenten.

- Coxeter groups This was a half course in the Fall of 2007, within the MasterMath program. The other half, on Permutation Groups, was given by Hendrik Lenstra. The lecture notes are here.
- Knot theory This was a tiny course within the MasterMath program. The other parts of the course, Quantum groups and knot theory, was given by Eric Opdam and Jasper Stokman. The course was intended for the regular graduate students as well as the Master Class Quantum groups, affine Lie algebras and their applications 2007-2008.
- Algebra 2 (2WF10) several years, some joint with Aart Blokhuis.
- Computer algebra (DIAMANT) Spring 2007