How to Study for a Test in One Day (A Realistic Guide)

Let's be honest first

One day is not enough time to learn a semester of material. This guide isn't going to pretend otherwise.

What one day is enough for: covering the highest-priority material, consolidating what you partially know, and walking into the exam in a better position than if you'd done nothing. That's a realistic and achievable goal.

Cramming is not an effective long-term study strategy — University of Waterloo's Student Success Office describes it as an "emergency technique" that should never become the default. But sometimes emergency techniques are what the situation calls for. Here's how to use yours well.

The first thing to do: triage

Don't open your notes yet. Spend the first 20-30 minutes figuring out what actually matters.

• What does the exam cover? (Past papers, syllabus, exam guides if available)
• What was emphasised in lectures? (Repeated points, things the professor spent time on)
• What do you already know reasonably well vs. what's genuinely unclear?

This is the traffic light method: mentally sort your topics into green (solid), orange (shaky), and red (blank). Your day is going to be spent almost entirely on orange and red.

The most common mistake in last-minute cramming is trying to review everything equally. You don't have time for that. You need to make strategic cuts and focus your hours where they'll produce the most exam points.

A realistic schedule for one day

Morning: highest-value material

Start with your most important topics while your focus is fresh. Work in focused blocks of 45-50 minutes with 10-minute breaks. Don't try to marathon through — cognitive fatigue compounds quickly and you need to stay sharp through the evening.

For each topic: read your notes or a summary once, then close them and try to recall the key points from memory. Write them down. This is active recall — it does more for memory consolidation than re-reading the same page.

Afternoon: practice problems and weak spots

If your exam involves problem-solving, calculations, or essay questions, this is when to work through practice examples — not read more notes. Doing is different from knowing. The only way to find out whether you can actually answer exam-style questions is to try them.

Return to the orange topics you identified during triage. These are likely to give you the most return: you already have some framework for the material, so a focused review session can solidify it into something reliable.

Evening: consolidation, not new material

Stop adding new topics after dinner. Save the Student's revision guide is clear on this: at this stage, sleep is more valuable than an extra hour of cramming. Your brain consolidates memories during sleep — studying until 3am and sitting the exam on 4 hours of sleep will cost you more than you gain.

Use the last hour before bed to review flashcards or a quick summary of the key points you covered today. Then stop and go to sleep.

Active recall beats re-reading. Every time.

If you only take one thing from this guide: don't just re-read your notes. Roediger & Karpicke (2006) demonstrated that retrieval practice — actively trying to recall information — produces substantially better retention than restudying, even when the total time is equal.

In practice, this means:

• Read a section, close the notes, and write down what you remember
• Do practice questions rather than reading answers
• Quiz yourself with flashcards (cover the answer before checking)
• Explain a concept out loud as if teaching it to someone else

These approaches are harder and less comfortable than re-reading. That discomfort is the point. The mental effort required to recall something is what makes the memory stick.

Sleep is non-negotiable

Multiple studies have linked sleep quality to exam performance. Researchers in Belgium found a significant correlation between getting a good night's sleep and achieving higher test scores. Pulling an all-nighter before an exam trades short-term coverage for impaired recall, slower processing, and worse performance under pressure.

Get at least six hours. Seven or eight is better. If you've covered the highest-priority material, you've done what you can — a rested brain will outperform an exhausted one on exam day.

The short version

When you have one day: triage aggressively, use active recall instead of re-reading, focus on your weakest high-priority topics in the morning, practice applying the material in the afternoon, and stop adding new content by evening. Sleep.

This won't save a semester of non-attendance. But it's a substantially better approach than hoping something sticks from a 6-hour reading marathon the night before.

---

Running short on time? Upload your lecture recordings or course notes to Tutoremy and get structured summaries, flashcards, and practice quizzes generated from your actual course content — in minutes, not hours. Try Tutoremy free →