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Course and exam enrolment

You can enrol for courses and exams via uSis or your faculty's education administration office.

Take a look under your faculty or study programme tab for further information. If you have any questions, please contact your education administration office


Do you have a question about uSis? If so, please consult our FAQs or send a mail to the uSis web editors

How to register for a course in uSis

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Course and exam enrolment

If you want to take a certain subject and / or examination (including re-sits), you have to register via uSis in a classnumber.  Mostly these classnumbers refers to an EXAMINATION, but you are kindly asked to enroll as soon as you plan to follow a course. Then the coordinator can use the list of enrolled students as an indication of the number of students that can be expected in the group. Find the numbers you need by choosing your Bsc of Msc programme in the menu below or by the TAB that indicates the study programme. To change the study programme, fill in your choice on the upper right hand side of the screen.

Click here to open a guide to enrolling with a classnumber.



You can't log into uSis ? Here you find some information on your ULCN account, that you need for entrance to the university systems.

For other uSis questions, send an email to usis-fwn@science.leidenuniv.nl .  Always mention your name, studennumber and study. 

uSis and Brightspace
Brightspace is the learning management system for staff and students of Leiden University. 

Enrolling for classnumbers in uSis gives you entrance to the corresponding courses in Brightspace. 

You can find more information on Brightspace here.


uSis and MyTimeTable.

find MTT by typing rooster@leidenuniv.nl in your browser.

MyTimeTable is as of 2021-2022 the place where you can find the classnumbers that are available for enrolling. 

You can search by title or usiscode of the name of a study which will give you the lists of all courses that are offered in that study in the current year. All items that are available are shown, including the classnumbers that  are created when an item is put into the roster program.  

Enrollment in one of the items automatically adds you tot the linked Brightspace page.

You can also find the classnumbers in MyTimeTable.

Below you will find the classnumbers for the courses/exams that are offered in the year 2021 - 2022. Classnumbers also be found in MyTimeTable (Be aware to choose the option that has a mark 2021 for the courses of the next year.

Are you unable to find a course? Mail to usis-fwn@science.leidenuniv.nl . It would help if you add a link to the E-study guide for the specific course.

For the Bachelor study Life Science and Technology you do not need to register in uSis. The administration of these courses is in Delft.



Astronomy (link  to astronomy website)

Biology  14-7-2021

>Biopharmaceutical Sciences  Link to the E-guide; check the documents on the right hand side

Computer Science (14-7-2021)

We advise you to go to MyTimeTable to find the classnumbers for the courses of the bachelor Computer Science 

Mathematics (14-7-2021)

Molecular Science & Technology (tba)

Physics  (link  to physics website)

Master Specialisations

Specialisation Business Studies (4-8-2020)

Specialisation Science Communication and Society (31-10-2020)

Education: You don't need to enroll for classnumbers for the Education-courses

Below you will find the classnumbers for the courses/exams that are offered in the year 2021-2022.

The Classnumbers can also be found in MyTimeTable.

You can find a course in the list of your study programme. Are you unable to find a course? Mail to usis-fwn@science.leidenuniv.nl . 

Astronomy (Link to Astronomy web-page; check final page of the document)

Biology  (14-7-2021)

Biopharmaceutical Sciences (14-7-2021)

Chemistry and Life Science and Technology (LIC) (14-7-2021)

Computer Science  (14-7-2021)

Governance of Sustainability (14-7-2021)

ICT in Business and the Public Sector (14-7-2021)

Industrial Ecology (14-7-2021)

Mathematics (15-7-2021)

Media Technology (14-7-2021)

Physics (Link to web-page; check final page of the document)

Statistical Science   (14-7-2021)

Mathematics (15-7-2021) 

Master Specialisations

Specialisation Business Studies (15-7-2021)

Specialisation Science Communication and Society (15-7-2021)

Education: You do not need to enroll for the classnumbers of this specialisation.

The enrollment period for the minors 2021-2022 is closed. If you are accepted in a minor, please do not forget to enroll for the courses that are part of this minor..

After you have received confirmation that you have a place in the minor, you should enroll for the courses that are part of the minor. If classnumbers are available, you can find them by clicking on the name of the minor.

Computational approach to Disease, Signalling and Drug Targets 4000MCOADN

Modern Drug Discovery 4000MMODDN

Molecular Biotechnology 4000MMBION

Sustainable Chemistry and Biotechnology 4000MSCHBN

Leidse minoren 

Cyber Security Governance Essentials 4000MCSGEN

Data Science and Artificial Intelligence 4000MDSAIN

Human Evolution 4000MHUEVN

Quantitative Biology 4000MQBION (1056)

  • Quantitative Biology 15EC 4000KBITN (1057)

Science, Business and Innovation  4000MSCBIN (1058)

  • Science, Business and Innovation: Management Courses 4000KSBI1N (1059)
  • Science, Business and Innovation: Entrepreneurship Courses  4000KSBI2N (1060)

Sustainable Development 4000MDONTN (1061)

LDE Minors

LDE minors are a cooperation between Leiden, Delft en Rotterdam. 

<more information follows>




Science Faculty Courses

Some courses do not 'belong' to a certain programme of study but are for 'all' Students.

These courses are for 2021-2022: List of Faculty Courses 21-22

Course and exam enrolment

Enrolment and/or cancellation of enrolment for all exams, resits and practicals is mandatory. This also applies to the Bachelor Research Project (see below for more information). Enrolment for any study activity should be completed before the specified closure date. Find out below how to enrol for study activities and how to cancel your enrolment, if necessary.

You have to enrol for all exams, resits, practicals and research projects before the closure date of that particular study activity. The default closure date is 10 calendar days before the exam date, but there are exceptions. The deadline for enrolment and cancellation of enrolment is up until 23.59 hrs on the closure date of the exam. Please find an overview of all closure dates in the Examination schedules.

Follow the steps below to sign up for courses and exams:

  1. Login at uSis with your Brightspace account.
  2. Click on 'Main Menu' and go to 'Self Service'.
  3. Click on 'Student Center'.
  4. Click on 'Enrol' and then choose 'Enrol by entering the class number'.
  5. Enter the class number of the study activity as listed in the 'uSis studieactiviteit' column of the Examination Schedule. Click on ‘Continue’.
  6. Select the class the appears in the bottom and click on ‘To shopping cart’.
  7. The course can now be found under ‘Shopping cart’. Go to this page and select the course. Click on ‘Enrol’.
  8. After succesful enrolment you will receive a confirmation email. Please note! Only if and when the class appears under 'My Class Schedule' in uSis, your enrolment is valid and final.

The Bachelor Research Project also requires enrolment through uSis. Make sure to enrol for the correct study activity. For the academic year 2018-2019 the codes in the table below apply. Study activity codes for previous years can be found in the respective examination schedules.

To cancel your enrolment for a course or exam, follow the same procedure in uSis as described above for enrolment. Of course you need to select 'Cancel enrolment' instead of 'Enrolment'. Please note! Only if and when the class disappears under 'My Class Schedule' in uSis, your cancellation is valid and final.

Timely enrolment for study activities is your own responsibility. Failing to enrol or to cancel your enrolment in time will have consequences. If you do not enrol before the closure date, your grade will not be registered. Failing to cancel your enrolment, your chance for the exam will be considered as used. Please note that resits always require separate enrolment.

According to article 4.6.4. of the Rules and Regulations of the Examination Committee, deviations from the procedures for enrolment as described on this page can be imposed or allowed. More information on this can be found in the Examination Protocol Physics & Astronomy (in Dutch). When submitting a written and motivated request to the Board of Examiners, use one of the following online forms:

Astronomy: online request form Astronomy Board of Examiners
Physics: online request form Physics Board of Examiners

Students following a double bachelor's programme should submit the request at the Board of Examiners of their programme of first registration.

If you cannot enrol or cancel your enrolment via uSis, you can alternatively enrol by sending an email to usis-fwn@science.leidenuniv.nl before the closure date or go to the Science Student Administration in person before the closure date (Gorlaeus Lecture Hall, B1.17).

If you encounter technical difficulties in enrolling or cancellation of your enrolment in uSis, send an email to usis-fwn@science.leidenuniv.nl. Make sure to always include your student number, study, the course you want to enrol in and a description of the problem. Also indicate that you refer to information on the uSis website.

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