How to stop cramming and start this week

Why do you keep cramming?

Most people who cram know, in a vague way, that it isn't ideal. They keep doing it for two reasons.

It feels like it works. In Kornell (2009), students learned word pairs from flashcards, either spaced out or massed together, including a version where study was crammed into the last day before the test. Across the experiments, spacing was more effective than massing for 90% of participants. Yet after the first study session, 72% of participants believed massing had been more effective. Cramming gives you a strong, fresh sense of familiarity right now, and that feeling is easy to mistake for learning that will last.

Distant deadlines don't feel real. Steel's (2007) meta-analysis of procrastination research found that some of the strongest and most consistent predictors of putting things off were how unpleasant the task is, how far away the deadline is, low confidence that you can do it, and impulsiveness. An exam in three weeks loses to almost anything happening tonight. Then the deadline gets close, the pressure arrives all at once, and cramming is the only option left.

So the fix isn't more willpower in the final week. It's making studying start earlier, feel smaller, and give you honest feedback that it's working. If starting at all is the problem, our guide on how to stop procrastinating on studying goes deeper on that part.

What does cramming actually cost?

Cramming can get you through tomorrow's test. What it costs is next month. The spacing effect is one of the most replicated findings in memory research: a meta-analysis by Cepeda and colleagues (2006) pulled together 839 assessments of distributed practice from 317 experiments, and found that spreading study out generally beats massing it together, with the best gap between sessions getting longer the longer you need to remember.

A later study by Cepeda and colleagues (2008) taught more than 1,350 people a set of facts, gave them a review after a gap of up to three and a half months, and tested them up to a year later. The best gap between study sessions grew as the test got further away. For a test a week later, the best gap was about 20 to 40% of that week, so roughly one and a half to three days. For a test a year later, it was about 5 to 10% of the year. Cramming puts the gap at zero, which is the wrong answer for any test that isn't in the next few hours.

There are other costs. The NSW Department of Education's guide for HSC students lists them plainly: leaving study to the last minute can be overwhelming and cause stress and anxiety, stress makes recall harder, and staying up all night to study is counterproductive because poor sleep leads to patchy concentration in the exam.

How to stop cramming, step by step

1. Pick one subject with a test coming up. Not everything. Breaking a habit works better with one clear target.
2. Book three short sessions, a few days apart. 20 to 30 minutes each, on specific days and at specific times, before the test. Put them in your calendar the same way you would a lesson.
3. Start every session with a test, not your notes. Answer questions or write down everything you remember about the topic before you open anything. Testing yourself beats rereading: in Roediger and Karpicke (2006), students who tested themselves remembered substantially more a week later than students who restudied, even though the restudiers felt more confident.
4. Check, then fix only the misses. Look up what you got wrong or couldn't recall. Leave what you already know alone.
5. Leave the next session's questions ready. End by noting the three things you missed, so the next session starts with them.
6. Keep the night before short. If the work is done, the night before is a quick self-test on your misses and then sleep, not a four-hour marathon.

Short sessions matter. The NSW guide suggests working in short bursts and not studying for more than an hour without a break. A 25-minute self-test that you actually do beats a three-hour plan that you keep postponing.

What does a week without cramming look like?

Say you have a biology test next Friday. Instead of four hours on Thursday night:

• Saturday: 25 minutes. Test yourself on the first half of the topic, then relearn the misses.
• Monday: 25 minutes. Retest Saturday's misses, then test yourself on the second half.
• Wednesday: 25 minutes. Mixed questions on the whole topic, with the hardest ones first.
• Thursday: 15 minutes. Only the questions you are still getting wrong. Then stop and sleep.

That is less than two hours in total, spread over a week, with gaps of about two days that fit what Cepeda and colleagues found for a test a week away. For longer gaps and exam dates further off, our spaced repetition schedule sets out when to come back to a topic, and the 2357 study method is a simple version of the same idea.

What if you slip back into it?

You will, at least once. A habit built over years doesn't vanish in a week. When it happens:

• Don't throw out the plan. One crammed test isn't a reason to stop spacing the next one.
• Cram well if you have to. Test yourself instead of rereading, focus on what is most likely to come up, and stop in time to sleep. Our guide to studying the night before an exam covers exactly that.
• Look at what went wrong. Usually it is a session that was too long, booked at a bad time, or never booked at all. Make the next one shorter and give it a fixed slot.

A visible habit is easier to keep. Ace has streaks and a study calendar, so you can see which days you studied, and it turns your own class notes, slides or PDFs into practice questions written from that material only, so each short session can start with a test on the chapters you choose. The how it works page shows the steps.

Frequently asked questions

Sources

1. Kornell, N. (2009). Optimising learning using flashcards: Spacing is more effective than cramming. Applied Cognitive Psychology, 23(9), 1297–1317.
2. Cepeda, N. J., Pashler, H., Vul, E., Wixted, J. T., & Rohrer, D. (2006). Distributed practice in verbal recall tasks: A review and quantitative synthesis. Psychological Bulletin, 132(3), 354–380.
3. Cepeda, N. J., Vul, E., Rohrer, D., Wixted, J. T., & Pashler, H. (2008). Spacing effects in learning: A temporal ridgeline of optimal retention. Psychological Science, 19(11), 1095–1102.
4. Roediger, H. L., & Karpicke, J. D. (2006). Test-enhanced learning: Taking memory tests improves long-term retention. Psychological Science, 17(3), 249–255.
5. Steel, P. (2007). The nature of procrastination: A meta-analytic and theoretical review of quintessential self-regulatory failure. Psychological Bulletin, 133(1), 65–94.
6. NSW Department of Education. 5 reasons to kick your cramming habit. Stay Healthy HSC.