What McMaster rewards
McMaster is in Hamilton, Ontario, and you do not apply through the US Common App. You apply through OUAC, the Ontario Universities' Application Centre. As an American, an international student, or anyone who has already left high school, you use the OUAC 105 form. The core of admission for most programs is your grades: McMaster wants five Grade 12 academic subjects (or the IB/AP equivalent), Grade 12 English, and typically an 80% minimum average just to be eligible. For a large share of programs, there is no essay at all.
The catch is that McMaster's most competitive programs bolt a supplementary application onto the OUAC form, and that is where your writing matters enormously. Honours Health Sciences uses two written essays of 1,500 characters each. Engineering, Computer Science, iBioMed, and Bachelor of Technology use a timed format of three video answers plus one written answer. Arts and Science, iArts, Integrated Science, and several others have their own supplementary pieces too. These are not US-style "tell me your life story" essays. They are short, sharp, often timed prompts that test how you think. This page covers the writing McMaster actually asks for and how to make it land.
01Thinking, not achievement lists. McMaster's supplementary prompts reward how you reason, not what you have collected. Honours Health Sciences openly looks for original, well-structured thinking and genuine self-insight rather than a recap of awards. A clear line of thought beats a crowded resume in prose.
02Fit with the specific program. Each supplementary application belongs to one program and is read by that program. Engineering wants resourcefulness and composure under pressure. Health Sciences wants reflection and critical analysis. Generic answers that could be sent anywhere read as exactly that. Tailor your evidence to the program you are answering.
03Composure under constraints. Several supplementary formats are timed or character-capped. Engineering gives you one minute to prep and two to speak per video, and ten minutes total for the written question. Health Sciences caps each essay at 1,500 characters. The skill being tested is making one clear point cleanly, fast, without padding.
04Honest, specific self-reflection. Question 1-style health sciences prompts ask about setbacks, defining moments, or what makes you you. They reward a real, concrete moment thought through honestly, not a polished story engineered to impress. Specificity and self-awareness are the signal.
Essay prompts for 2026-2027
3 prompts for McMaster, each broken down with annotated examples.
Health Sci essay: reflection1,500 characters including spaces and punctuation
In Grade 10 I quit the debate team after losing a regional round I was sure I had won. I told myself the judges were biased. Months later I rewatched my recording and saw it plainly: I had answered the question I wished they had asked, not the one they did. That stung more than the loss. What I had called bias was really me refusing to hear feedback that did not flatter me. So I went back, not to win, but to get told where I was wrong and actually listen. I started asking judges one question after every round: what did you not believe? Their answers were uncomfortable and specific, and they made me sharper than any trophy would have. I now treat being wrong as information rather than insult. The setback was not losing the round. It was how long I spent protecting my version of it before I was willing to look.
Health Sci essay: critical thinking1,500 characters including spaces and punctuation
A wellness company claims its app cut users' stress by 40%, citing a study of 200 paying subscribers who reported feeling calmer after eight weeks. Before I trusted that number, I would ask who was left out. Paying subscribers who stayed eight weeks are exactly the people the app was already working for; everyone who quit in week two is invisible. There is no comparison group, so I cannot tell the app apart from time passing, the season changing, or simply expecting to feel better. Self-reported calm is also not the same as a measured stress marker. None of this proves the app fails. It proves the claim is not yet evidence. To believe the 40%, I would want a control group that never used the app, the dropouts counted, and an outcome measured rather than felt. The interesting question is not whether the app works. It is what would have to be true for that number to mean what it says.
Engineering written answerTimed: 10 minutes total to read and respond
Being resourceful, to me, means solving the problem in front of you with what you actually have, not the ideal version you wish you had. In my robotics club our 3D printer died the week before a competition and we could not get a part in time. Instead of stalling, I redesigned the bracket so it could be cut from scrap acrylic we already had and assembled with screws instead of a printed clip. It was uglier and took an afternoon of trial and error, but it held, and the robot competed. Resourcefulness matters in engineering because real projects never arrive with every resource ready. Budgets, time, and parts run short, and the engineer who can still move the project forward with constraints is the one a team relies on. It is not about being clever for its own sake. It is about not letting a missing piece become a stopped project.