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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.

Check MyTime Table for the most actual classnumbers !

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 (15-7-2021)

>Biopharmaceutical Sciences  4-2-2021 

Computer Science (14-7-2021)

Computer Science and Economics (tba)

Bioinformatics (tba)

Computer Science- Artificial Intelligence (tba)

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 (15-7-2021)

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 (15-7-2021)

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..

Registration dates for minors in 2021-2022 are as follows: 

. 1st April - 15th April 2021 for selection minors 
. 3rd May  - 31th  May  for LDE + EUR/TUD minors
. 3rd May - 15th May  voor LEI minors 

  • Every minor has a limited number of places. These are allocated on a first come, first served basis (with the exception of selection minors*). So apply on time.
  • You may only follow one minor. So only apply for one minor to ensure that your fellow students can also get a place. 
  • If you are placed on a waiting list for your first choice of minor, you can apply for a second minor.
  • You can change or cancel your applications right up to the end of the application period. 

Selection minors

Enrollment in usis is possible with the classnumber that is mentioned after the title of the minor

Computational approach to Disease, Signalling and Drug Targets 4000MCOADN (1048)

  • Part 1 of Computational approach to Disease, Signalling and Drug Targets 4000KCAD1N (1049, 15 EC)
  • Part 2 of Computational approach to Disease, Signalling and Drug Targets 4000KCAD2N (1050, 15 EC)

Modern Drug Discovery 4000MMODDN (1054)

Molecular Biotechnology 4000MMBION (1055)

Sustainable Chemistry and Biotechnology 4000MSCHBN  (1078)

Leidse minoren 

Biodiversity 4000MBIODN (1047 )

Cyber Security Governance Essentials 4000MCSGEN (1051)

  • Cyber Security Governance Essentials 15EC : enroll for the 30EC minor

Data Science and Artificial Intelligence 4000MDSAIN (1052)

Human Evolution 4000MHUEVN (1053)

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 Computer Science 2021-2022

To participate in Computer Science courses uSis enrolment is needed. Without timely registration, participation may become impossible and grades cannot be registered. Some courses consists of lectures only, others consists of both lectures and workgroups/practicums. If the latter is the case, you need to sign up in uSis for the workgroups/practicums as well. 

Important notes:

  • New incoming students can only sign up for courses in uSis if their Leiden University registration for the Master Computer Science is completed.
  • Enrolment in lectures, workgroups/practicums and exams (including retakes) is required before the start of each semester (see instructions below). 
  • You always sign up for retakes separately no later than ten days before the retake date. Do not sign up for retakes automatically. Only register for retakes after not passing the exam.

Problems signing up in uSis?

If you encounter problems with your course and exam registration in uSis, please send an email to the Science Student Administration via usis-fwn@science.leidenuniv.nl. Make sure to include your student number, study programme, the course you want to enrol in and a brief description of the problem.

How to enrol in uSis

Follow the steps below to register for Computers Science courses:

  1. Login at uSis with your ULCN/Brightspace account
  2. Click on 'Main Menu' and go to 'Self Service'
  3. Click on 'Student Center'
  4. Click on 'Enrol'
  5. Enrol in one of the following ways:

1. Enrol by entering the class number

  1. Click on 'Enrol by entering the class number'
  2. Enter the class number of the course as listed in Master Computer Science Classnumbers Fall 2021 or in My Timetable (MTT). Click on ‘Continue’
  3. The course can now be found under ‘Shopping cart’. Go to this page and select the course. Click on ‘Enrol’

2. Enrol by searching the course/using the catalogue number

  1. Click on 'Enrol by searching the course'
  2. Select the relevant academic year and click on 'Continue'
  3. Fill in the fields and click on 'Search'
  4. Courses matching your search will appear below the search field.
  5. Select the course you want to sign up for. Take note of the column ‘Description’, that indicates whether the course is an exam or a retake. Click on ‘To shopping cart’.
  6. The course can now be found under ‘Shopping cart’. Go to this page and select the course. Click on ‘Enrol’.

Note on the Catalogue numbers:

  • Catalogue no. + H = Lecture or seminar
  • Catalogue no. + W = Workgroup or practicum
  • Catalogue no. + T = Exam or retake
  • Catalogue no. + X = Other assessment method (e.g. assignments, paper or report) with fixed, 'artificial' submission dates in uSis. Final submission deadlines will be announced by the lecturer during class.

My Timetable

In My Timetable (MTT) you can find the schedules of all Master Computer Science courses. You can create your own personal schedule based on your study plan by adding different course timetables. Courses you are enrolled in through uSis are automatically added in your timetable. Schedule changes are automatically implemented in your calendar, and, if you like, you can receive change notifications by e-mail. My Timetable can be easily connected to calendar apps on your smartphone.

Questions about how to use My Timetable? Read the instruction or watch the instruction video (Dutch only). For troubleshooting, contact the ISSC helpdesk.

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