Few things create more pressure in a Grade 12 household than the university average. Ontario admissions are competitive, offers often hinge on a few percentage points, and it can feel like the number is already decided. It usually isn't — but improving it depends entirely on where you put your effort.
This is a practical, honest guide for students and parents: how the Ontario average is actually built, which courses move it most, what's realistic in the time you have, and where focused effort pays off before applications go in.
- Find the exact top-six courses your target programs count — effort outside that set barely moves your average.
- Focus on the courses with the most room to improve, and prioritize program prerequisites.
- Start early: consistent work over weeks beats last-minute intensity, and the time left sets what's realistic.
- Most stuck marks come from an earlier foundation gap — diagnose and rebuild it instead of just reviewing.
Know exactly which courses count
Ontario universities calculate admission averages from your top six Grade 12 U and M courses, and almost every program requires specific ones — ENG4U for nearly everything, plus prerequisites like MHF4U, MCV4U, SCH4U, SPH4U, or SBI4U depending on the program. The first move isn't studying harder; it's knowing precisely which six courses your target programs will count, because effort spent on a course outside that set does little for your average.
Check the admission requirements for your specific programs directly on each university's site or through the Ontario Universities' Info (OUInfo) portal. Requirements and the exact courses counted can differ between programs at the same school, so confirm rather than assume.
Focus where the marks are most movable
Not every course offers the same room to improve. A course you're sitting at 70 in usually has far more upside than one you're already at 90 in, where each extra point costs enormous effort. Look honestly at where you stand across your top six, and concentrate on the two or three courses where a focused push can realistically gain the most.
Prioritize prerequisite courses, too. A strong mark in a course your program specifically requires can matter more than the same gain elsewhere, because some programs look closely at prerequisite performance, not just the overall average.
Be realistic about timelines
How much you can move depends on how much time is left. With a full semester ahead, meaningful improvement across several courses is genuinely achievable. With a few weeks before final marks are submitted, the realistic goal is to protect and lift one or two courses, not transform the whole transcript.
We're deliberately not going to promise a specific jump by a specific date — anyone who does is guessing. What's true is that consistent, well-directed work over weeks reliably outperforms last-minute intensity, and the earlier you start, the more the average can move.
Fix foundations, don't just review
The most common reason a Grade 12 mark is stuck is a gap from earlier — a Grade 11 concept that never fully landed and now quietly undermines everything built on top of it. Re-reading current material doesn't fix that. Tracing the mark back to where the understanding first broke, and rebuilding from there, does.
This is why students who simply study more often plateau: they're reinforcing the same shaky foundation. Diagnosing the actual gap is the highest-leverage thing you can do, and it's often a unit or two earlier than where the marks slipped. Our guide on why Grade 12 marks drop goes deeper on this pattern.
Build a study system, not a study mood
Averages move on systems, not motivation. The students who improve tend to do the same unglamorous things: short, regular study blocks instead of occasional marathons; an error log that turns every wrong answer into a target; and practice done from a blank page rather than with notes open. None of it is exciting, and all of it works.
Protect the basics around the studying, too — sleep, a consistent schedule, and starting major assignments early. A surprising amount of lost average is really lost marks on assessments that were rushed or missed, not concepts that weren't understood.
Use assessments as information, not verdicts
Every test and assignment is data about where your understanding is thin. Students who treat a disappointing mark as a verdict learn nothing from it; students who treat it as a map — going back through every error to understand the cause — turn it into the next improvement. Over a semester, that single habit compounds into real movement on the average.
When one-on-one help is worth it
If a student is genuinely putting in the time and a key course still won't move, the issue is almost always a specific, identifiable gap — and that's exactly what targeted tutoring is built to find and close. The value isn't more studying; it's the right studying, aimed at the precise place the understanding broke.
At PAL's Academy, every tutor scored 90+ in the course they teach, works the Ontario curriculum by course code, and rebuilds foundations rather than drilling surface problems. You can see the courses we cover on our subjects page, and the honest place to start is a free consultation — a short conversation about where the gap actually is and a realistic plan for the time you have left. If you're weighing what programs will actually look at, our guide to what Ontario universities look at is a useful next read.