How to write supplemental and "why us" essays

By Yassin Bassem

Supplemental essays are the extra questions each university asks on top of the personal statement. If you apply to a lot of schools, you might end up writing a lot of them. They're easy to rush, and rushed supplements are one of the clearest signals that a student isn't really interested in a school.

I help my students with these every season. Here's how I'd approach them.

Answer the exact question

This sounds obvious, but it's the most common problem I see. A student writes a great essay that answers a similar question, not the one the school asked.

Before you write anything, read the prompt slowly and underline what it's really asking. Is it asking why this school, why this major, about a community you belong to, or about an intellectual interest? After you finish your draft, reread the prompt and check every paragraph against it.

The "why us" essay: be specific

"Why us" essays ask why you want to attend that particular university. The weakest answers talk about rankings, location, weather or "diverse community." Every school can claim those, so they don't tell the reader anything about you.

Strong answers connect real things at the school to real things about you.

  • Look for specific programs, classes, research opportunities, clubs or ways of learning that match your interests.
  • For each one, explain why it matters to you, using something from your own life.
  • Show how you'd take part, not just what you'd get.
  • Use the school's own website, course pages and student publications for detail. Make sure it's current.

A useful test: if you could swap in another university's name and the essay still works, it isn't specific enough yet.

Other common supplement types

Most supplements fall into a few groups:

  • Why this major: show where your interest came from and what you've already done to explore it.
  • Community essays: pick one community, describe your role in it, and show what you give as well as what you get.
  • Intellectual interest: write about something you genuinely get curious about, and show how you follow that curiosity.
  • Activity essays: go deeper on one activity. Show a moment, a challenge or a decision, not a list of duties.

Reusing material wisely

You don't have to write every supplement from scratch. Many prompts overlap, and it's smart to reuse good material. But do it carefully.

  • Reuse the core of an essay, then rewrite the parts that answer the specific prompt.
  • Always update school-specific details. Mentioning the wrong university's program is a mistake that's easy to make late at night.
  • Check your supplements against your personal statement so you're not telling the same story twice in one application.

Each part of your application should show something new about you. Think of it as one picture with lots of pieces.

Short answers and word limits

Some supplements give you 50 or 100 words, or even less. Short doesn't mean easy. Every word has to count.

  • Get to the point in the first sentence.
  • Pick one idea, not three.
  • Cut filler like "I believe that" and "in my opinion."
  • For list-style questions, be specific and a little personal. Real titles and real names beat general categories.

For longer prompts, use most of the limit, but don't pad. If you can say it in 230 words and the limit is 250, that's fine.

General vs specific: a quick example

Here's the difference in practice. A general sentence sounds like this: "I'm excited by the strong engineering program and the chance to do research." Almost any university could be named in that sentence.

A specific version names a real course or lab at that school, says what it works on, and links it to something you've already done, like a project you built at home or a problem you noticed in your community. Then it says what you'd add: a club you'd join, a skill you'd bring, a question you'd want to keep exploring there.

You don't need ten details. Two or three real ones, each tied to you, are far stronger than a long list of names copied from a website.

What I check before a supplement is ready

When I review a student's supplements, I go through the same short checklist every time:

  • Does every paragraph answer the prompt that was actually asked?
  • Is every school-specific detail correct and current?
  • Does this essay show something the rest of the application doesn't?
  • Is it within the word limit without losing the student's voice?
  • Would the student be happy to talk about this essay in an interview?

Plan your time

Make a list of every supplement for every school, with the word limit and deadline. Group similar prompts so you can see where reuse makes sense. Then start with the schools you care about most, so your best work goes where it matters.

The weeks before big deadlines fill up fast. Early drafts leave time for real revision.

Questions people ask me

How important are supplemental essays?
They matter, especially at selective schools. They're one of the best ways to show genuine interest and to show sides of you the personal statement doesn't.
Can I use the same "why us" essay for different schools?
You can reuse structure, but the specific details need to be about each school. If the essay still works with another school's name in it, it needs more detail.
What if a supplement is optional?
If you have something real to add, write it. If you'd only be repeating yourself, it's okay to skip it.
Should I repeat my personal statement topic?
Try not to. Each piece of your application should show something new about you.
All guides