Double DEC in Science + Social Science

St. Lawrence students have the opportunity to register in a program that will allow them to earn two complete DECs in three years.

Our Program

Double DEC in Science + Social Science (200.12)

The Double DEC in Science + Social Science is designed for students who are interested in having access to a wider variety of studies and an opportunity for more profound exploration of topics than a single DEC provides. General education courses (English, French, Humanities and Physical Education) count for both programs, and concentration courses for one program function as complementary courses for the other. In addition, both the Science and Social Science Programs (Commerce or Math Profiles) contain math courses. In your last semester, you will complete the comprehensive assessments for each program.

This Double DEC satisfies the pre-requisites for virtually all university programs. It also gives you extra time and experience to choose a career. By taking a mixture of science and social science courses from the beginning of the program, you will be exposed to many areas of studies and the competencies associated with them. By the end, you should have a better idea of the possibilities for future studies and careers. For some careers, such as environmental law, a more extensive grounding in both the physical and social sciences is also better preparation for further studies than is either the Science Program or the Social Science Program alone.

Other advantages include the fact that the 200.12 program has fewer courses per semester (five or six courses vs. seven or eight courses) and fewer weekly course hours per semester (an average of 22.2 hours vs. an average of 23.5 to 26 hours) than either the Science or Social Science Programs. The Double DEC also has fewer science and math courses per semester (two rather than three). A reduced course load gives the possibility of earning a higher R-score. In addition, you have an extra year to study in English before university.

McGill normally expects students who are seeking admission to medicine and dentistry to complete CEGEP in four semesters, but you are exempted if you take six courses per semester and complete a Double DEC in six semesters.


Starting in Fall 2024, there will be three parallel course sequences for each program and profile.

If you are eligible to attend English school under the Charter of the French language and are in possession of a certificate granted by the Ministry of Education, you are considered a Certificate Holder. Your course sequence will then be determined by your results in the high school French course (1-2 or 3-4). For more information about Certificates, please consult the Ministry of Education’s website.

If you are not eligible, you must follow the course sequence that prepares students for l'Épreuve uniforme de français (EUF - French minesterial language evalution).


For a brief overview of the changes to course sequences following Law 14, consult this document.

Click here to consult full course sequences for the Science + Social Science Double DEC Program. 

If you started your studies at St. Lawrence in Fall 2023 or earlier, please consult the course sequences below.





The following descriptions and course sequences are only correct if you began your studies in Fall 2023. If you began your studies prior to Fall 2023, please visit the legacy version of this page.

The same profiles continue to be offered, but course sequences will differ slightly starting in Fall 2024. Please see the first section on this page for more information and full course sequences for Fall 2024 and beyond.

There are no specific profiles in the Science + Social Science Double DEC. However, you can tailor your choice of upper-level Science and Social Science courses to fit your university plans. In addition, the math courses taken for Science also meet the requirements of the Commerce or Math Profiles of the Social Science Program. Here is the sequence of courses to be followed in order to complete these two DECs in three years: 

 I hold a certificate

I don't hold a certificate


For more detailed information about either the Science Program or the Social Science Program, you may visit their program pages.


All college programs in Québec have a graduate profile. This describes their graduates' competencies. In addition, there is a comprehensive assessment (CA) which evaluates whether students have met the expectations of the graduate profile. In some programs, the comprehensive assessment is linked to a course with an integrative activity (IA), building on what was learned in past courses.

In this Double DEC, you will complete the CA/IA requirements for both the Science and Social Science Programs in the sixth semester.


Your studies can lead to a wide range of careers, such as those below. Be sure to check university pre-requisites, since they vary. St. Lawrence students can see the Guidance Counsellor to discuss these options further. The Double DEC in Science + Social Science opens the broadest range of possibilities. By careful selection of option courses, you can ensure that even university programs with specific course prerequisites are open to you.

  • By taking Organic Chemistry and General Biology II as Science option courses, you can be eligible for admission to all health-related university programs at Québec universities.
  • By selecting Human Biology as a Social Science option course, you can be eligible to apply for psychology programs at Québec universities.
  • By choosing Microeconomics as a second-level Social Science option course, you can be eligible to study business administration or economics at Québec universities.

The DEC in Science allows admission to many programs related to the physical sciences and mathematics.

  • The DEC in Science can lead to further studies in health fields such as audiology, dentistry, kinesiology, medicine, microbiology, nursing, nutrition, occupational therapy, optometry, pharmacy, physiotherapy and veterinary medicine.
  • The DEC in Science can lead to further studies in pure and applied fields such as actuarial sciences, architecture, biochemistry, biology, chemistry, computer science, engineering, geology, geomatics, mathematics and physics.

The DEC in Social Science can lead to further studies in fields such as business administration, commerce, communications and journalism, counselling, criminology, economics, education, geography, history, industrial design, industrial relations, international business, international relations, law, political science, psychology, social work, sociology, tourism and urban studies.



Students applying for the Double DEC must satisfy the college general admission requirements and have the following pre-requisites:

  • Math TS 5 or SN 5
  • Chemistry 534 or equivalent
  • Physics 534 or equivalent

Apply for Admission