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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

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.


Below you will find the classnumbers for the courses/exams that are offered in the year 2018-2019.

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 . It would help if you add a link to the E-study guide.

Astronomy (Link to Institute's webpage)

Biology -  the information will be available via the E-guide (right hand side - 'Master usiscodes 2018-2019')

Bio-Pharmaceutical Sciences courses (19-11- 2018)

Chemistry (15-6-2019)

Computer Science (18-12-2018) - (Link to Institute's webpage)

ICT in Business and the Public Sector (7-3-2018)

Industrial Ecology (18-6-2019)

Life Sciences and Technology (15-6-2019)

Mathematics (9-4-2019)

- Media Technology (3-9-2018)

Physics (Link to Institute's webpage)

Statistical Science (29-4-2019)


Specialisation Business Studies (former Science Based Business) (19-9-2018)

Below you will find the classnumbers for the courses/exams that are offered in the year 2018-2019.

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 . It would help if you add a link to the E-study guide.

Astronomy (Link to Institute's webpage)

- Biology (Link to the E Studyguide : On the right hand side you will see "uSiscodelijst <Year>"

- Bioinformatics (3-12-2018)

- Bio-Pharmaceutical Sciences year 1 (13-2-2019)

- Bio-Pharmaceutical Sciences year 2 (10-5-2019)

- Bio-Pharmaceutical Sciences year 3 (19-12-2018)

- Computer Science (7-6-2019)

Computer Science and Economics (7-6-2019)

- Mathematics 4-3-2019)

- Molecular Science and Technology (5-2-2019)

- Physics (link to institute's webpage)


You can choose a minor in Leiden or in Delft or Rotterdam. Below is information on the enrollment for the various minors


Joint Minors

Minors in Delft or Rotterdam


The following Minors are offered in 2019-2020 by the Faculty of Science: 

Selection minors (registration from 1th april om 13.00 uur until 15th april)

You find the classnumber for registration following the minor title.

Attention: Sometimes everyone is placed on the waiting list. Final placement is done after the registration period is finished.. 

  • Minor Advanced Life Science and Technology  - 1062

  • Minor Computational approaches to Disease, Signaling and Drug Targets (CADSDT)  - 1063

    • Elective package CADSDT part 1 (15EC) - 1194

    • Elective package CADSDT part 2 (15EC) - 1195

  • Minor Modern Drug Discovery - 1064

  • Minor Molecular Biotechnology - 1065


Regular Minors (registration from 1th May, 13.00 uur until 1th August 2019)

Some minors offer the opportunity to only do a part of the minor as an elective package (15 ECTS ). 

You find the classnumber for registration following the minor title.

. Biodiversity and Natural Environment  - 1403

  • Elective package Biodiversity and Natural Environment- 1432

. Data Science - 1404

. Human Evolution (interdisciplinaire minor) - 1405

  • Elective package Human Evolution - 1431

. Quantitative Biology  - 1406

  • Elective packageQuantitative Biology - 1434

. Science Based Business  -  1407

  • Elective package Science Based Business part 1 - 1451
  • Elective package Science Based Business part 2 - 1452

. Sustainable Development (interdisc. minor)  - 1408

  • Elective package Sustainable Development BINA - 1433

The registration period for Minors in Delft and Rotterdam (Erasmus) for regular minors is from 1st May 2019 until 31th May2019.

Joint minors : (registration from 1st May 2019, 13.00  until 15th July 2019 - Registration via uSis.

.  Security, Safety and Justice  (interdisc. minor) #    TUD/LEI - 1219

.  Responsible Innovation (interdisciplinaire minor)#   LDE - 1061

.  Geo-resources for the future #,  TUD/LEI - 1218


The Joint Minor below requires selection and the registration starts 1th April.

You find the classnumber for registration following the minor title.

.  Frugal Innovation for Sustainable Global Development # , LDE -  1060

Minors in Delft or Rotterdam

You can find more information on the rules of application for minors in Delft and Rotterdam on this webpage. On the right hand side is a matrix which also contains the uSis Classnumbers for registration.

These Courses are in the year 2018-2019 available for registration:

Document + classnumbers  May 2019

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 Blackboard 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.

Astronomy 2018-2019 Class number EC Niveau Study activity
Bachelor Project: Research (Astronomy) 4072BRP18 18 400 15070
Bachelor Project: Thesis (Astronomy) 4072BPRT3 3 400 15071
Bachelor Project: Presentation (Astronomy) 4072BPRP1 1 400 14591
Astronomy & Physics
Bachelor Project: Research (Astronomy & Physics) 4602BOANP 20 400 15059
Bachelor Project: Thesis (Astronomy & Physics) 4602BOTH3 3 400 15060
Bachelor Project: Presentation (Astronomy & Physics) 4602BOPR1 1 400 15061
Astronomy & Mathematics
Bachelor Project: Research, Thesis and Presentation (Astronomy & Mathematics) 4602BOWIS 24 400 15062


Physics 2018-2019 Class number EC Level Study activity
Bachelor Project: Research (Physics) 4062BPR20 20 400 15072
Bachelor Project: Thesis (Physics) 4062BPRT3 3 400 15073
Bachelor Project: Presentation (Physics) 4062BPP01 1 400 15074
Physics & Astronomy
Bachelor Project: Research (Physics & Astronomy) 4602BOANP 20 400 15059
Bachelor Project: Thesis (Physics & Astronomy) 4602BOTH3 3 400 15060
Bachelor Project: Presentation (Physics & Astronomy) 4602BOPR1 1 400 15061
Physics & Mathematics
Bachelor Project: Research, Thesis and Presentation (Physics & Mathematics) 4602BOWIN 24 400 15063

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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