How to Highlight Effectively for Study

The research on highlighting has been consistent for fifty years: marking text while you read does little for memory, and marking too much can hurt. But the same research shows the conditions under which highlighting helps, and they are learnable in an afternoon. This section is built on that evidence and cites it.

Does highlighting help you learn? is the honest summary of the findings. The colour code system gives you three colours with fixed meanings that work on paper, in PDFs and on the web. Turning highlights into notes is the method that makes the marks pay off, and highlighting for teachers turns all of it into classroom activities that need no student accounts.

Teachers and librarians were the original tool's largest audience. These pages are written with them in mind as much as students, and every technique works with the free tools on this site or with a pen.

The pages are short on purpose and each ends with common questions and a sources list. If you read only one, read the review of the evidence; if you do only one thing differently afterwards, read a section to the end before you mark anything in it. That habit alone fixes most highlighting.

A practical order for a new term: read the evidence page first so you know why the rules exist, set up the three colours before your first reading, and try the notes method on one chapter before deciding whether it suits you. Teachers can run the classroom activities in a single lesson with printed text and pens, then repeat them on screen with the bookmarklet once students have the habit. Nothing on these pages asks for a sign up, a download or a subscription, and nothing you highlight with our tools is ever sent to us.