Step 3: Choose your courses

Step 3: Choose your courses

To become a registered student, you'll need to enroll in courses and pay fees for the session. Your first step is to choose the courses that you'd like to take. To do so, check out the Calendar and the Timetable.

The Calendar contains:
  • course descriptions (including prerequisites, corequisites, exclusions)
  • program and degree requirements
  • rules and regulations of the Faculty 
Use the Calendar to determine which courses you would like to take (to fulfill program/degree requirements, etc.) and whether you can take it (noting any prerequisites, etc.)
The Timetable contains:
  • a listing of courses offered in the session
  • schedule information (day, time, location, instructor)
  • special enrolment instructions, if any
Use the Timetable to figure out when your courses take place and put together a weekly schedule. Make note of any special enrolment instructions or procedures.


Updated timetable information is posted throughout the summer. Bookmark the Timetable and keep checking for new information!


Important things to keep in mind when choosing your courses

Maximum Course and Term Load - how many courses can I take?

Fall/Winter Maximum Course Load Limit: 6.0 full-course equivalents (FCEs)*
Fall/Winter Maximum Term Load Limit: six courses per term*

If you're in good academic standing, you can take up to 6.0 FCEs, including no more than six courses in each of the Fall and Winter terms. If you're on academic probation, your maximum course load is 5.0 FCEs and maximum term load is five courses per term.

See Step 5: Enrol in Courses for more information.

Prerequisites, Corequisites, Exclusions

Prerequisites, corequisites and exclusions are listed as part of the course descriptions in the Calendar. They are set by Departments to ensure students enrolling in the course have the appropriate background to take it. It is important that you observe any prerequisites, corequisites and exclusions before enrolling in a course. Keep in mind that ROSI/ACORN doesn't check that you meet them in real time - that is, you won't be warned or stopped from adding a course because of prerequisites; however, Departments often will check and may remove you at any time if you don't meet them. Similarly, if you've previously taken an exclusion, you may be removed from the course at any time or refused degree credit.

See sample course description

STA261H1    Probability and Statistics II [36L/12T]

[Course Description]

Prerequisite: STA257H1
Corequisite: MAT235Y1/MAT237Y1/MAT257Y1, MAT223H1/MAT240H1
Exclusion: ECO227Y1/STA248H1/STA255H1

Distribution Requirement Status: None
Breadth Requirement: The Physical and Mathematical Universes (5)

Took a prerequisite elsewhere?
To use a course taken at another university as a prerequisite, take your transcript and transfer credit assessment to the department offering the course either before or as soon as possible after enrolling in the course to check if that is sufficient. 


Enrolment Indicators and Controls

Enrolment indicators and controls appear in the Timetable and tell you if there are any special restrictions for enrolling in a course, and if so, how and when you may enroll, which is based on whether you meet the criteria. Not all courses have enrolment controls and some courses have multiple controls. See the Codes Used in the Timetable Listings page for more info.

  • Enrolment Controls are based on one or more of the following: admission category, subject POSt (Program of Study), year of study
  • Enrolment Indicators identify how enrolment controls are being used and/or alert you to different enrolment processes. See the Codes Used in the Timetable page for an explanation on each Enrolment Indicator.
Program of Study (Subject POSt) Enrolment

Some courses limit enrolment to, or give priority to students in specific subject POSts. This means your subject POSts will have to be up-to-date before you begin course enrolment. Refer to the Enroll in Subject POSts page for details.

Space in courses

The Faculty makes every attempt to ensure that the room assigned will accommodate the number of students expected to enrol; however, as there is not unlimited space to meet demand, some students may not obtain space in every course they want. You may add yourself to a waiting list for a course or courses, but this does not guarantee enrolment in the course(s). It's always best to select alternative courses in which to enrol in the event that the one you want is full. Try to be flexible, with as many alternative course choices as possible.

Note: To be fair to all students, selling/buying places in courses is not permitted. Students found selling/buying courses will be reported to the Dean's Office for academic misconduct, and may face penalties.

Course Conflicts - avoid them!

Conflicts occur when students enroll in courses that take place at the same time. When putting together your schedule, it's important to make sure none of your course overlap in time because ROSI/ACORN won't prevent you from enrolling in courses that conflict. If you choose to enroll in conflicting courses, please note that no special consideration or accommodation will be made for any problems that occur as a result (e.g. term tests scheduled at the same time, assignment due dates, attendance). Since you can't be at two places at the same time, avoid conflicts in your schedule!

Use the weekly schedule worksheet here to help you create a conflict-free schedule.

Other Important Notes

Wheelchair access

Not all classroom locations are wheelchair-accessible. If you require wheelchair access, please inform your college registrar’s office of your course choices as soon as possible. 

Alternating Practical Sections in First-Year BIO and CHM

In some first-year courses, you may choose to take your practicals on the same day in alternating weeks.

Click for more information

Courses include:

Biology: BIO120H1F and BIO130H1S
Chemistry: CHM138H1F/S and CHM139H1F/S

NOTE: You CANNOT alternate practicals in CHM151Y1, nor PHY131H1/132H1/151H1/152H1 with the above courses.

Fall term:

BIO120H1F and either CHM138H1F or CHM139H1F – select P sections in BOTH courses that end in the DIFFERENT digit.

For example, if you intend to take BIO120H1F, section P0201 (T1:30 to 4:30), you can take CHM138H1F P0202 (T2-5) so your Biology and Chemistry labs take place on alternating Tuesdays in the fall session.

Winter term:

BIO130H1S and either CHM138H1S or CHM139H1S – select P sections in BOTH courses that end in the DIFFERENT digit.

For example, if you intend to take BIO130H1S section P0401 (R1-4), you can take CHM138H1S P0402 (R2-5) so your Biology and Chemistry labs alternate on Thursday in the winter session.


Courses offered by other U of T campuses

Interested in taking courses offered by other U of T campuses? 

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If you want to enrol in courses offered by the University of Toronto at Mississauga (UTM) or the University of Toronto at Scarborough (UTSC), check the UTM or UTSC enrolment instructions.

You may enroll in these courses starting August 14, 2015.

Enrolment in some UTM and UTSC courses is restricted to students registered on those campuses, or have very limited space for Arts & Science, St. George students.

It is your responsibility to:

  • ensure that these courses do not duplicate and are not exclusions for courses you have already taken.
  • check with your subject POSt sponsor regarding the acceptability of courses for program requirements.
  • check with your college registrar’s office regarding the acceptability of courses for degree requirements.

Failure to follow these steps could result in loss of credits and delay your graduation.