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Course and exam enrolment

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

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

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

Use MyTimeTable to find the actual classnumbers. In MTT, select "Business studies" or "science communication and society" as Programme of Study and select the course you want to follow. In brackets you find the classnumber


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

Selection Minors:


Computational approach to Disease, Signalling and Drug Targets 4000MCOADN  (1102)

  • Computational approach to Disease, Signalling and Drug Targets: Part 1 4000KCAD1N (1072)
  • Computational approach to Disease, Signalling and Drug Targets: Part 2 4000KCAD2N (1073)

Modern Drug Discovery 4000MMODDN  (1150)

Molecular Biotechnology;4000MMBION  (1151)

Sustainable Chemistry and Biotechnology 4000MSCHBN  (1152)

Minors from Leiden

Biodiversity 4000MBIODN (1071)

Cyber Security Governance Essentials 4000MCSGEN (1074)

Data Science and Artificial Intelligence 4000MDSAIN  (1075)

Human Evolution 4000MHUEVN (1077)

Quantitative Biology 4000MQBION (1078)

Science, Business and Innovation  4000MSCBIN (1080)

  • Science, Business and Innovation: Management Courses 4000KSBI1N (1081)
  • Science, Business and Innovation: Entrepreneurship Courses  4000KSBI2N (1082)

Sustainable Development 4000MDONTN (1083)

LDE Minors

LDE minoren are a cooperation among the universities of Leiden, Delft en Rotterdam. 

Responsible Innovation - 5000MREIN (1046)

Geo-resources for the Future - 4000MGEORN (1076)

Space Missions - 4000MSPMIN (1148)





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

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