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How to Write Caltech's "Sustained Intellectual Engagement" Essay

A STEM question, problem, idea or project that has held your attention over time: what drew you in, how you pursued it, what you still want to understand.

200 wordsChoose 2 of 3Intellectual curiosity2026-27
California Institute of Technology's wording, checked October 26, 2026
“Tell us about a STEM question, problem, idea, or project that has held your attention over time. What drew you to it, how have you pursued it, and what do you still want to understand?”

How to approach it

  1. 1Show time passing: months or years, with stages.
  2. 2Cover all three parts the prompt lists.

A structure that works

One way to shape this answer. It describes moves, not sentences: the words have to be yours.

  1. 1What drew you to the question.
  2. 2How you pursued it, over time.
  3. 3What you still want to understand.

Where the 200 words go

PartWords
The moment or exampleabout 80
What it shows or changedabout 70
Why it matters, or what you bringabout 50

Mistakes to avoid

  • A one-weekend project framed as long-term.

The checklist our grader uses for this question

When you check your Caltech answers, this answer is read against these 5 areas. Each comes back Met, Partly or Missing with a quote from your draft as evidence, and together with the 200 words limit they set its readiness verdict.

AreaWhat a reader looks for
Answers the questionThe opening sentences answer what was asked, plainly, before background or a hook; every part of a multi-part question is answered.
One specific ideaIt names one specific topic, question or idea early, narrower than a whole subject.
Evidence you pursue itIt shows what the applicant read, built, asked or tried on their own, beyond required class work.
Your own thinkingThe reader sees how the applicant's mind works on it: a connection, an opinion, a question still open.
Caltech's askCovers what drew the applicant to the question, how they pursued it over time, and what they still want to understand.

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Questions

How long is Caltech's "Pursuing: sustained intellectual engagement" essay?

Up to 200 words.

Is it required?

Choose 2 of 3. Caltech's full set of questions is on the Caltech supplemental essays page.

Can I reuse an essay from another college for this prompt?

You can start from material you have, but rewrite it for Caltech's exact wording: answer every part of this question, and cut what it does not ask for.

Can Statementory write or improve my answer?

We never write or rewrite it: colleges ask you to affirm your essays are your own work. Our checker reviews it against the checklist on this page, quotes your own words, and asks the questions only you can answer.

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