The BMS publishes a list of courses on their website every semester (https://www.math-berlin.de/academics/courses). These courses are all in English, sorted by the BMS research areas and are picked from the course catalogues from all three Berlin universities (FU, HU and TU).
Please check out or info page on the different university websites which provides links to guides on how to use them.
Freie Universität Berlin (FU):
All FU students must register for FU courses online via Campus Management:
https://www.ecampus.fu-berlin.de/
Please note that the online registration deadline for courses with a limited number of participants is shortly before the lectures start.
The registration deadline for all other courses is usually a month after the start of the semester. (https://www.fu-berlin.de/sites/campusmanagement/N3InfoStudenten/Anmeldezeitraum).
Phase I students will also need to register for the "What is...?" seminar and the seminar "BMS Fridays" using Campus Management for two semesters if you wish to obtain 15 credits from them. These two seminars will then count as 15 ungraded credits in the "Ergänzungsmodul" once you have passed your QE.
All non-FU students, please contact the lecturer of the FU course you wish to take as soon as possible and ask them to register. You can use the FU-system "Whiteboard" (similar to Moodle (HU) and ISIS (TU)) by logging in with your HU or TU login:
https://mycampus.imp.fu-berlin.de/sakai-login-tool/container/tu
https://mycampus.imp.fu-berlin.de/sakai-login-tool/container/hu
Humboldt-Universität zu Berlin (HU):
All HU students must register for HU courses online via AGNES for courses taking place at the HU (unless stated otherwise on the course page). Please note that the online registration deadline is shortly before the lectures start.
All non-HU students, please contact the lecturer of the HU course you wish to take as soon as possible and ask them to register. You can also login to Moodle using your FU or TU account („Registrierung für externe Accounts“).
Technische Universität Berlin (TU):
Usually, TU students need not register for TU courses, they may simply attend the first lecture. Some courses require you to register via the TU online learning tool ISIS: https://isis.tu-berlin.de/ However, registration for all tutorials is required via MOSES before the lectures start. Access to the online courses and documents will mostly be provided via the TU online learning tool ISIS or on the lecturer's own website.
All non-TU students, please contact the lecturer of the TU course you wish to take as soon as possible and ask them to register. Most will however tell you that a registration is not necessary and simply to subscribe to their ISIS course page. You can also login to ISIS using your FU and HU login.