What is the Cornell note-taking system?

A page layout developed at Cornell University in the 1950s. The page is split into a narrow left column for cue questions, a wide right column for notes during the lecture, and a bottom strip for a one-paragraph summary in your own words.

When do I fill in each section?

During the lecture: only the right column (the notes). Within 24 hours: the left column (cue questions) and the bottom summary. Later, for review: cover the right column and answer the cues from memory.

Why is Cornell better than just taking notes?

It's not the layout that matters, it's the system. Cornell forces a short review pass after every lecture, which is when most learning happens. Plain notes don't enforce that habit.

Can I use Cornell on a laptop?

Yes. Apps like Notion, Obsidian, and Goodnotes have Cornell templates. The discipline (review pass, cue questions, summary) matters more than the medium.

How do I use Cornell notes to study for an exam?

Cover the right column and try to answer each cue from memory. That turns your old notes into a free practice quiz: active recall on material you already organized into useful questions.

Cornell Notes: A Step-by-Step Guide With Examples

Cornell notes are a system, not just a layout. The page split into three areas is just the scaffolding that makes the system harder to skip. Here's how to actually use it.

The page layout

Divide a blank page into three areas:

Right column (about two-thirds of the page width): notes during the lecture.
Left column (about one-third width): cue questions, added after the lecture.
Bottom strip (the last quarter or so of the page height): a summary in your own words, written within 24 hours.

You can buy pre-divided Cornell notebooks, but a horizontal line two inches from the bottom and a vertical line two inches from the left edge of a regular page works fine.

During the lecture: the right column only

Take notes in the right column as the lecture happens. Paraphrase, don't transcribe. The cue and summary sections stay empty for now.

Leave white space. If the lecturer moves to a new topic, drop a line. Crowded notes are hard to review; spaced notes are inviting.

If you don't understand something, write a small question mark in the right column next to it. That's a flag for the cue pass.

Within 24 hours: cues and summary

This is the work most students skip, and it's where most of the benefit lives. It takes about 10 minutes per page.

Left column (cues). Read each section of your right-column notes and write a question in the left column that the notes would answer. Three to five cue questions per page is typical. The cue is what you'd want to be able to answer on a test.

Good cues are specific:

What are the three properties of an effective hash function?
Why did the Treaty of Versailles cause economic instability in Germany?
What's the difference between Type I and Type II errors?

Weak cues are vague:

Lecture 4 stuff.
Things about ecosystems.

Bottom strip (summary). Write one short paragraph (two to four sentences) summarizing the lecture in your own words. If you can't, you didn't understand the lecture yet, which is useful information.

Later, for study: cover and answer

When the exam approaches, your weekly Cornell pages are now a free question bank. Cover the right column. Read the cue. Answer from memory. Uncover and check.

Cues you get right go on a rare-review schedule. Cues you get wrong go on a daily-review schedule until they stick. This is active recall on material you already organized into the right questions, which is the highest-leverage study you can do with class notes.

Why it works

The Cornell layout is just packaging. What it actually does is force three things students otherwise skip:

A review pass within 24 hours, while the lecture is still fresh.
The act of writing the questions, which is itself a deep processing pass.
A built-in quiz format for later study.

If you do those three things, the layout is optional. But the layout is what makes most students actually do them. That's why it survives.

Questions

What is the Cornell note-taking system?: A page layout developed at Cornell University in the 1950s. The page is split into a narrow left column for cue questions, a wide right column for notes during the lecture, and a bottom strip for a one-paragraph summary in your own words.
When do I fill in each section?: During the lecture: only the right column (the notes). Within 24 hours: the left column (cue questions) and the bottom summary. Later, for review: cover the right column and answer the cues from memory.
Why is Cornell better than just taking notes?: It's not the layout that matters, it's the system. Cornell forces a short review pass after every lecture, which is when most learning happens. Plain notes don't enforce that habit.
Can I use Cornell on a laptop?: Yes. Apps like Notion, Obsidian, and Goodnotes have Cornell templates. The discipline (review pass, cue questions, summary) matters more than the medium.
How do I use Cornell notes to study for an exam?: Cover the right column and try to answer each cue from memory. That turns your old notes into a free practice quiz: active recall on material you already organized into useful questions.