How to Cram for an Exam When You've Run Out of Time

To cram for an exam when you've run out of time, triage first: pick the topics most likely to be examined and worth the most marks. Then practise past questions on them and test yourself from memory instead of rereading, and stop early enough to get a proper night's sleep. That is the most effective way to use a few desperate hours. It is not as good as studying over weeks, and this guide will be honest about that, but it will help you walk into tomorrow's exam with as many marks as possible within reach.

Take a breath. You're reading a plan, which already puts you ahead of scrolling in a panic.

Is cramming bad for you?

Let's get the honest part out of the way. Spreading study over several sessions works better than packing it into one. This is the spacing effect. Cepeda and colleagues (2006, Psychological Bulletin) reviewed hundreds of experiments and found that spaced practice produced better long-term retention than massed practice. Material you cram tonight will fade quickly, which matters if a later exam builds on it.

So cramming is a bad strategy. It is also sometimes the only option left. If that's where you are, the goal changes. You're not trying to learn the course properly tonight. You're trying to get the most marks you can tomorrow, and to keep enough sleep to think clearly in the exam.

Once this exam is over, the long-term fix is spaced repetition and a realistic study timetable. For now, let's work with the time you have.

Step 1: Spend 10 minutes making a plan

When you're panicking, it's tempting to open the textbook at page one and start reading. Don't. Ten minutes of planning will save you hours.

1. Work out how much time you really have. Count the hours between now and when you need to go to bed, minus meals and a few breaks.
2. Find out the exam format. Multiple choice, short answer, essays, problems? How long is it? What are you allowed to bring?
3. List the topics. Use the syllabus, course outline, study design or your teacher's revision list.
4. Gather your weapons. Past papers with solutions, practice questions, your notes, any revision sheet your teacher gave you.

Here's how to split the time you've got:

Notice the last column never changes.

Step 2: How do you decide what to study when cramming?

You can't cover everything, so choose what gives you the most marks per hour. Rate each topic on three things:

• Weight: how many marks it's likely to be worth.
• Frequency: how often it appears in past papers.
• Familiarity: how much you already know. Partly familiar topics are the quickest wins.

Partly known, high-weight, frequently tested topics come first. Rare topics you've never seen come last. Skipping a topic feels scary, but spending two hours on something worth two marks while ignoring something worth twenty is the bigger risk.

Also look for clues. Did your teacher spend a whole lesson on something? Did they say "this will be on the exam"? Is there a revision sheet? Use all of it.

Step 3: Why should you go straight to past questions?

When time is short, past questions are the fastest way to learn what matters. They show you the question style, what's actually asked and what earns marks.

1. Pick the top-priority topic.
2. Find two or three past or practice questions on it.
3. Try the first one without notes. If you're stuck after a few minutes, look at the solution and study how it works.
4. Try the next one without looking.
5. Write down anything you got wrong or didn't know.

This is learning by doing. You'll pick up the content as you need it, and you'll be practising the exact skill the exam tests.

If there are no past papers, use textbook questions, end-of-chapter reviews, tutorial problems or questions your teacher set during the term.

Step 4: Use active recall, not rereading

Rereading your notes feels like studying, and you'll recognise everything, but recognising something isn't the same as being able to write it down in an exam. Testing yourself is more effective. Roediger and Karpicke (2006, Psychological Science) found that students who practised recalling material remembered more of it later than students who spent the same time restudying it.

Quick ways to use active recall when cramming:

• Blurting: write a topic heading, then write everything you remember for 5 to 10 minutes. Check your notes and fill gaps in a different colour.
• Cover and recall: cover a page of notes, say or write the key points, then uncover and check.
• Self-quiz: turn headings into questions and answer them out loud.
• Explain it: talk through a process or argument as if teaching a friend.

Try first, then check. That order is what makes it work.

Step 5: Write a one-page summary from memory

Near the end of your session, take a blank page and write, from memory, everything you need for tomorrow:

• key formulas and definitions
• quotes or examples for essay topics
• steps for the main processes or methods
• the mistakes you made tonight and how to avoid them

Then check it against your notes and fix anything wrong. This sheet is what you'll read over breakfast and before you walk in. Writing it from memory is one more round of recall, and it gives you a compact review sheet that isn't 40 pages long.

Step 6: Work in short blocks with your phone away

Cramming time is precious, so protect it.

• Use timed blocks. 25 to 30 minutes of focus, 5 minutes of break, repeated. Short blocks keep you going when you're tired and stressed.
• Get your phone out of reach. Put it in another room or block distracting apps. A five minute scroll at 9pm is a big slice of a three hour cram. For more on this, read how to stop checking your phone while studying.
• Take real breaks. Stand up, drink water, step outside. Don't use breaks for social media, which rarely stays at five minutes.
• Tell people. Let your family or housemates know you need a few hours of quiet.

Should you pull an all-nighter before an exam?

No, if you can possibly avoid it. It feels like the hard-working choice, but it usually costs you marks.

Sleep is when your brain consolidates what you've learnt during the day. Skipping it means less of tonight's work is still there tomorrow. Sleep loss also slows your thinking, hurts concentration and makes careless mistakes more likely, which is exactly what you can't afford in an exam.

Worse, it's hard to notice. Pilcher and Walters (1997, Journal of American College Health) found that students kept awake all night did worse on a reasoning test than students who slept, yet rated their own performance and effort higher. Tired brains are bad at judging how tired they are.

A better plan:

1. Study in focused blocks through the evening.
2. Stop at least 30 to 60 minutes before bed.
3. Sleep at your normal time, or as close as you can.
4. Do a short, focused review in the morning.

If you're choosing between two more hours of late-night cramming and two more hours of sleep, take the sleep.

What does a night-before cram schedule look like?

Here's a realistic plan for an evening, assuming an exam the next morning:

Adjust the times to your own bedtime. Keep the shape: plan, priority topics in blocks, summary, pack, sleep.

What about caffeine and food?

Eat a proper dinner and some breakfast. Your brain runs better with food, and an empty stomach in a long exam is distracting.

Be careful with caffeine late in the evening. It can make it harder to fall asleep, which undoes the most useful part of your plan. Water is your friend tonight. If you have any health conditions or take medication, stick to your usual routine and your doctor's advice.

What should you do on the morning of the exam?

• Wake up with time to spare. Rushing raises stress.
• Eat something. Even a small breakfast helps.
• Do a 15 minute warm-up. Reread your one-page summary, then try two or three easy questions to get your brain into gear.
• Don't learn anything new. A new topic at 8am is more likely to confuse you than help.
• Avoid the panic circle. If the group outside the exam room comparing topics makes you anxious, stand somewhere else.
• Arrive early. Know the room, have your materials ready and sit down calm.

How do you handle an exam you're underprepared for?

Once you're in the exam, how you play it matters even more when you haven't studied much.

1. Read the whole paper first if you can. Use any reading time to spot questions you can answer.
2. Start with what you know. Bank easy marks early to build confidence.
3. Allocate time by marks. Don't spend 20 minutes on a 2 mark question.
4. Attempt everything. Partial answers often earn partial marks. A blank page earns none.
5. Show your working. Method marks can rescue a wrong final answer.
6. Read the verbs. "Explain" wants how or why, "describe" wants features, "evaluate" wants a judgement.
7. Write down your one-page summary. Once writing time starts, jotting key formulas on scrap paper or the back of the paper (if allowed) gets them out of your head before stress sets in.

How do you avoid cramming next time?

You got through this one. Now make the next exam easier.

• Start earlier. For major exams, begin structured revision several weeks out. The full plan is in how to study for exams.
• Review a little each week. Short recall sessions after each class mean revision later is review, not first-time learning.
• Space it out. Come back to each topic after a few days, then a week, then two weeks.
• Keep your past papers. Tonight's mistakes are next exam's revision list.

Cramming isn't a moral failing. Life gets busy, deadlines bunch up and some weeks just go badly. The point is to make it the exception.

How to do this in StudyDork

StudyDork is a free iPhone app for studying with friends, and it can keep a cram session on track.

• Short focus blocks: the free Pomodoro timer runs 20 minute focus blocks with 5 minute breaks, which suits a tired evening. Pro adds the 25/5 Classic and other splits. Blocks and breaks switch over even when your phone is locked.
• Phone off limits: choose the apps that distract you and the app blocker keeps them closed until the session ends, even if StudyDork is closed. With Pro, Ultra Locked In removes every way out of a session, so there's no "just one quick check".
• Company: if your clanmates are cramming for the same exam, you can see them at their desks in your clan's study room and keep each other honest in the chat.

When the session ends, put the phone down and go to bed.

You've got this, and then you've got sleep

You can't learn a whole course tonight, and you don't need to. Pick the topics worth the most, do past questions on them, test yourself from memory, write your one-page summary and go to sleep. Tomorrow, read the sheet, warm up with a couple of questions and walk in ready to collect every mark within reach. Then, once the exam is done, start next time's revision a little earlier.