How to study for exams without cramming
Cramming feels productive. You stay up late, reread everything, and the pages start to look familiar. Then the exam comes and half of it is gone. The fix isn't studying more hours. It's spreading the same hours out, testing yourself instead of rereading, and keeping your sleep.
Why cramming feels like it works
When you read the same chapter three times in one night, it gets easier to read. That smooth feeling is easy to mistake for knowing it. But recognizing something on the page is not the same as pulling it out of your head on a blank exam sheet.
Psychologist Nate Kornell tested this with students learning vocabulary on flashcards. Spreading the cards out over a session beat cramming them for 90% of the students. Yet after the first session, 72% of them believed cramming had worked better.1 So if cramming feels good, that's not proof it's working. Your gut is a poor judge here.
A big review of ten common study methods by John Dunlosky and colleagues came to a similar place. Rereading and highlighting, the two things most crammers do, were rated low usefulness. Spreading study out over time (spaced practice) and testing yourself (practice testing) were the only two rated high.2
1. Count back from the exam date
Open your calendar, find the exam, and count back. One to two weeks is a good window for most tests. List the topics, then spread them across the days so each topic shows up at least two or three times, with a few days between visits. That spacing is the core idea behind spaced repetition.
You don't need long sessions. Three or four short blocks a day beat one exhausting night. If planning blocks is new to you, time blocking for beginners walks through it.
2. Test yourself instead of rereading
Close the book and try to recall. Write everything you remember about a topic on a blank page, answer old exam questions, or use flashcards. Then check what you missed and look only at that.
In a well-known study by Henry Roediger and Jeffrey Karpicke, students who read a passage and then practiced recalling it remembered much more two days and one week later than students who simply read it again. Rereading only came out ahead on a test five minutes later.3 That's exactly the trap: rereading wins tonight and loses on exam day.
Testing yourself feels harder, and you'll get things wrong. That struggle is part of why it works, so try not to read it as a sign you're failing.
3. Mix up your practice
Once you know the basics of each topic, stop doing all the problems of one kind in a row. Shuffle them. On the exam, nobody tells you which method a question needs, so practice choosing.
Doug Rohrer and Kelli Taylor had students practice math problems either grouped by type or shuffled together. The shuffled group did worse during practice but far better on a test a week later.4 Evidence for mixing is strongest for math and similar problem-solving subjects, so treat it as a useful extra rather than a rule for everything.
4. Keep your sleep
The all-nighter is the heart of cramming, and it tends to backfire. Andrew Fuligni and colleagues followed 535 high school students who kept daily diaries over two weeks. On days when students gave up sleep to study more than usual, they reported more trouble understanding things in class and more struggles with tests and homework the next day.5 This was a diary study, so it shows a link rather than proving cause, but it fits what most students already feel the morning after.
Put your last study block early enough that you can get a normal night's sleep before the exam. A quick, light review the next morning is fine.
5. Work in short rounds with real breaks
Long, unbroken study sessions blur together. Try 25 or 50 minutes on one topic, then a short break away from your desk. The Pomodoro Technique is built on this rhythm, and how long study breaks should be covers the break side.
6. Write your worries down before the exam
If exams make you nervous, try spending ten minutes just before the test writing honestly about what worries you. Gerardo Ramirez and Sian Beilock found that students who did this scored better on a high-stakes test than students who sat quietly, and the boost was biggest for the most anxious students.6 It's a small, free thing to try, though one set of studies isn't the final word.
If exam stress is so strong that it stops you from studying or sleeping, or feels like more than nerves, it's worth talking to a doctor, counselor or your school's student support team.
If the exam is tomorrow
Sometimes it's already too late to spread things out. That's okay. Use the same ideas on a small scale: skip rereading, test yourself on the biggest topics first, take short breaks, and stop early enough to sleep. Then next time, start counting back a little sooner.
How Focusland helps
Focusland is a cozy focus timer for iPhone. You pick a room, sit down at a little table next to others, write the topic you're reviewing in the task box, and start a 25 minute, 50 minute or no-timer session. Focus, Short break (5 min) and Long break (15 min) keep your rounds and rest in rhythm. Finishing sessions earns coins and keeps your daily streak going, which is a nice nudge to show up for a short review every day instead of one long night. If you need to stop early, Hold to Give Up keeps your streak safe.
Common questions
How many days before an exam should I start studying?
There's no single magic number, but one to two weeks lets you visit each topic two or three times with gaps in between. For a big final, start earlier and keep sessions short.
Is cramming ever okay?
Cramming can help you scrape through a test tomorrow, but what you learn that way fades fast. If you'll need the material again, for a final or a later course, spacing it out pays off.
Is rereading my notes a waste of time?
Not a total waste, but it's one of the weakest methods on its own. Read once to understand, then switch to recalling from memory and checking what you missed.
Should I pull an all-nighter before an exam?
Usually no. Losing sleep to study is linked to having a harder time the next day. A normal night's sleep and a short morning review is a safer bet.
Sources
- Kornell, N. (2009). Optimising learning using flashcards: Spacing is more effective than cramming. Applied Cognitive Psychology, 23(9), 1297–1317. doi.org/10.1002/acp.1537
- Dunlosky, J., Rawson, K. A., Marsh, E. J., Nathan, M. J., & Willingham, D. T. (2013). Improving students’ learning with effective learning techniques. Psychological Science in the Public Interest, 14(1), 4–58. doi.org/10.1177/1529100612453266
- Roediger, H. L., & Karpicke, J. D. (2006). Test-enhanced learning. Psychological Science, 17(3), 249–255. doi.org/10.1111/j.1467-9280.2006.01693.x
- Rohrer, D., & Taylor, K. (2007). The shuffling of mathematics problems improves learning. Instructional Science, 35(6), 481–498. doi.org/10.1007/s11251-007-9015-8
- Gillen-O’Neel, C., Huynh, V. W., & Fuligni, A. J. (2013). To study or to sleep? The academic costs of extra studying at the expense of sleep. Child Development, 84(1), 133–142. doi.org/10.1111/j.1467-8624.2012.01834.x
- Ramirez, G., & Beilock, S. L. (2011). Writing about testing worries boosts exam performance in the classroom. Science, 331(6014), 211–213. doi.org/10.1126/science.1199427