Is highlighting completely useless?

Not useless, but low-yield: Dunlosky et al. (2013) rated highlighting and underlining low utility because, on their own, they rarely improve performance on later tests beyond simply reading the material. It isn't harmful — it just shouldn't be your main strategy.

Why do "learning styles" persist if the evidence doesn't support them?

The idea is intuitive and flattering — everyone feels they have a preferred way of taking in information. But Pashler, McDaniel, Rohrer & Bjork's 2008 review found no adequate evidence that matching teaching to a person's preferred "style" (visual, auditory, kinaesthetic) improves learning outcomes. Popularity outran the evidence.

Does cramming ever work?

For a test tomorrow, short-term recall can hold up reasonably well. The cost shows up later: Cepeda et al. (2006) found spaced practice reliably beats massed practice (cramming) for what you can still recall weeks or months on — which is what actually matters for cumulative subjects and board exams.

What is a "desirable difficulty"?

A term from the psychologist Robert Bjork's research programme describing strategies that feel harder in the moment — retrieval, spacing, interleaving — but produce more durable learning than strategies that feel easy, like rereading. The discomfort is often a sign the technique is working, not that it's failing.

Do I need to use all ten techniques?

No. Start with the two rated High utility — practice testing and distributed practice — since they carry the strongest evidence for the least added complexity. Layer in interleaving and elaborative interrogation as the material allows.

Methods · Calculator

Study Spacing Planner

Revision plans fail on arithmetic before they fail on discipline. This counts the slots you actually have against the passes you intend, and names the shortfall.

Updated 26 Aug 2026 By Amit Jain interactive Evidence review

Run it with your own numbers.

Revision plans fail on arithmetic before they fail on discipline. This counts the slots you actually have against the passes you intend, and names the shortfall.

Topics to cover

Days until the date

Study sessions a day

Minutes per session

Passes per topic

Slots against passes

Days multiplied by sessions is what you have. Topics multiplied by passes is what you intend. The plans that collapse are the ones where nobody multiplied.

What gives

When the intention exceeds the slots, only two things can move: passes per topic, or days. The tool states both, so the choice is made deliberately rather than discovered in the last week.

It states no recommended number of passes

How many times a topic needs revisiting depends on the topic, the exam and you. The passes figure is an input for that reason, and the even spacing it reports is arithmetic rather than a claim about how memory works.

Real questions, short answers.

What counts as a topic?

Whatever unit you would actually sit down and revise in one session. If a topic needs three sessions, it is three topics for this purpose.

Should I plan for every day?

Only if you will use every day. A plan built on days you will not work is the same as a plan that does not fit, discovered later.

What about the spare slots?

Keep them. The topics that need a fourth pass are not known in advance, and a plan with no slack converts one bad day into a failed plan.