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Course selection can bring up a lot of questions and emotions. After all, you’re making decisions that will shape your academic path, and that’s not something to be taken lightly. If you’re feeling the pressure, don’t panic. We’ve got some great tips that’ll help make this process a little easier!

No one in the world knows your tastes, preferences, and abilities better than you do. The trouble is, you can be equally interested in more than one course! Even if course selection feels daunting, try not to put too much pressure on yourself: yes, your choices will have an impact on your future, but you’re not making any life-or-death decisions!
You may find yourself being influenced by the advice of friends and family. While it’s okay to listen to recommendations and opinions from people who know you and have valuable input to share, at the end of the day, the courses you choose are entirely up to you. Here are a few ideas to help with your decision-making:
In Secondary III and IV, students are asked to choose between two compulsory courses: ST (Science and Technology) and AST (Applied Science and Technology).
What do they have in common?
ST and AST share more than 60 percent of their course material and focus on developing the same practical and theoretical competencies.
Both are quality courses that lead to an SSD (secondary school diploma).
How do they differ?
The main distinction between ST and AST is that they have different teaching approaches. The table below shows how the two courses compare. You must choose one or the other:
| Science and Technology (ST) | Applied Science and Technology (AST) | |
| Course summary |
Approach that focuses on solving science and technology problems. Emphasis on the material world, Earth, and space. |
Practical approach that focuses on understanding concepts by examining their applications. |
|
This course is for you if . . . |
|
|
If you have a strong interest in science, you can also add Environmental Science and Technology (EST) or Science and Environment (SE) to your core courses in Secondary IV.
For a better idea of what your science options look like throughout high school, check out this handy chart, which includes the number of units each course is worth.
If you’re not interested in pursuing advanced science courses, you can stop at the compulsory ST options in Secondary III and IV. You can also change courses in Secondary IV without having to postpone graduation.
In Secondary IV, you can take Environmental Science and Technology (EST) or Environmental Science (ES) as an elective. Choosing either of these courses will allow you to take Chemistry and Physics in Secondary V. In other words, EST and ET are prerequisites for Chemistry and Physics.
At first glance, the EST and ES profiles look very similar. In fact, they share 60 percent of their course material and focus on developing the same skills. They also both address environmental issues.
It’s important to know that if you chose ST in Secondary III and want to take a science elective in Secondary IV, you must enroll in EST. Conversely, if you chose AST in Secondary III and want to take a science elective in Secondary IV, you must enroll in SE. In other words, ST is a prerequisite for taking EST, while AST is a prerequisite for taking SE.
You can learn more about high school science options by reading this concept sheet.
Check with your guidance counsellors to see if both science paths are available when registering for your courses, as some schools may decide to offer only one.
In Secondary III, students are asked to pick their Secondary IV math course. This is a very important decision, as it generally determines their school curriculum for the next two years. For example, if you choose the Science Option (SN), you will likely follow this track in Secondary IV and V.
How do you choose the “right” math option? As with choosing any course, you should think about your future plans, your strengths, and your interests.
Though all three options encourage exploration, experimentation, and simulation, each has its own course of study.
Let’s take a closer look:
1 – Cultural, Social, and Technical Option (CST)
This option prepares you for further studies in social sciences, communications, or the arts. To help determine if it could be the right choice for you, ask yourself the following questions:
Possible pre-university college programs:
2 – Science Option (SN)
This option is specifically aimed at students who want to get into the fields of pure (natural) science and research. If this choice appeals to you, it’s important to make sure that it suits your personality. Ask yourself these questions:
Are you interested in understanding the origin of certain phenomena?
Possible pre-university college programs:
All of them, as long as you passed SN math in Secondary IV AND V.
If you only passed SN math in Secondary IV, other programs will become available to you once you’ve completed a make-up course to obtain the credits for Secondary V (offered by many colleges).
3 – Technical and Scientific Option (TS)
This option is ideal for students who’d like to continue their studies in a technical or university program, in a field related to biology, administration, humanities, engineering, etc. To find out if this is the right choice for you, ask yourself the following questions:
Possible pre-university college programs:
All of them, as long as you passed SN math in Secondary IV AND V
If you only passed TS math in Secondary IV, other programs will become available to you once you’ve completed a make-up course to obtain the credits for Secondary V (offered by many colleges).
Your math grades in Secondary III can affect which options are available to you in Secondary IV and V. Given that the TS and SN courses feature more advanced content, certain schools require that students have a minimum grade in math—usually 75 percent. However, these requirements can vary between institutions, so it’s a good idea to check with your school.
At the end of your SE or EST course, you can choose from the following options:
Keep in mind that Chemistry and Physics have a number of prerequisites. Don’t hesitate to speak to your school’s guidance counsellor when you start Secondary III to make sure you have all the information you need.