How to Remember What You Study: 10 Science-Backed Techniques
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Quick Answer: The two highest-leverage study techniques are active recall (closing your notes and trying to retrieve information from memory before re-reading) and spaced repetition (reviewing material at increasing intervals right before you'd forget it). Re-reading and highlighting — the most popular student methods — are rated Low effectiveness in research. The single fastest way to improve: replace half your re-reading time with self-testing. Even failed retrieval attempts build stronger memories than successful re-reading.
Knowing how to remember what you study is the difference between students who struggle and students who excel. You have spent hours reading your notes, reviewing your textbook, and highlighting key passages, but when the exam arrives, your mind goes blank. This frustrating experience is not a sign of low intelligence or poor memory. It is a sign that you are using study methods that feel productive but are scientifically proven to be ineffective. If an exam is already on the calendar, turning reading notes into a revision system is the fastest place to start.
Cognitive science has identified specific techniques that dramatically improve how much you remember. These are not tricks or shortcuts. They are methods backed by decades of research in memory, learning, and neuroscience. This guide covers the ten most effective techniques, ranked and explained so you can start using them immediately.
Why You Forget What You Study
Before diving into solutions, it helps to understand the problem. Human memory operates on a "use it or lose it" principle. When you first encounter new information, your brain creates a fragile memory trace. Without reinforcement, that trace degrades rapidly, following what researchers call the Ebbinghaus forgetting curve.
The forgetting curve shows that within 24 hours of learning something new, you will forget approximately 70% of it. Within a week, up to 90% is gone. This is true regardless of how intelligent you are or how hard you studied initially.
The techniques below work by intervening at critical points in this forgetting process, strengthening memory traces before they degrade and building durable long-term memories.
Technique 1: Active Recall
Effectiveness: Very High
Active recall is the single most powerful study technique supported by research. Instead of re-reading your notes or textbook, you close your materials and attempt to retrieve the information from memory. For a deep dive into the science behind this, see our guide on what is active recall.
How to Practice Active Recall
After reading a section of your textbook, close the book and write down everything you can remember. Do not worry about getting everything right. The struggle of trying to retrieve information is what strengthens the memory.
You can practice active recall by creating flashcards and testing yourself, closing your notes and writing a summary from memory, answering practice questions without looking at your materials, or explaining concepts out loud as if teaching someone.
Why It Works
When you passively re-read material, your brain performs a recognition task, which is easy. When you actively recall it, your brain performs a retrieval task, which is harder but far more effective at strengthening memory. Studies show that students who practice active recall outperform those who re-read by 50% or more on subsequent tests.
Technique 2: Spaced Repetition
Effectiveness: Very High
Spaced repetition is the practice of reviewing material at increasing intervals over time instead of cramming everything into one session. Learn more about this technique in our complete guide to spaced repetition.
The Optimal Spacing Schedule
A practical spacing schedule looks like this: review new material the same day you learn it, then again after one day, then after three days, then after one week, then after two weeks, and then after one month.
Each time you successfully recall the information, the interval before the next review increases. If you fail to recall it, the interval resets to a shorter period.
Why It Works
Spaced repetition exploits the way memory consolidation works. Each retrieval strengthens the neural pathway, and the increasing intervals push the memory deeper into long-term storage. Cramming creates short-term memories that fade quickly. Spaced repetition creates durable memories that persist for months or years.
Technique 3: Interleaving
Effectiveness: High
Interleaving means mixing different topics, types of problems, or subjects within a single study session instead of practicing one type repeatedly (called "blocking").
How to Interleave
If you are studying three chapters for a biology exam, do not study Chapter 1 completely, then Chapter 2, then Chapter 3. Instead, alternate between topics: study a concept from Chapter 1, then a concept from Chapter 3, then one from Chapter 2, then back to Chapter 1.
For math or science, mix problem types within a practice session rather than doing twenty of the same type in a row.
Why It Works
Interleaving forces your brain to continuously retrieve different strategies and make distinctions between related concepts. This feels harder than blocked practice, which is precisely why it works better. The added difficulty during practice leads to stronger learning.
Technique 4: Elaborative Interrogation
Effectiveness: High
This technique involves asking "why" and "how" questions about every fact and concept you study, then answering those questions.
How to Practice
When studying that "mitochondria are the powerhouse of the cell," ask: Why are mitochondria described this way? How do they produce energy? Why are they essential for cell function? How do they relate to the other organelles?
Force yourself to explain the answers in your own words. The act of generating explanations creates multiple pathways to the same information in your memory.
Why It Works
Elaborative interrogation creates connections between new information and your existing knowledge. Instead of isolated facts floating in memory, you build an interconnected network where each fact is linked to reasons, mechanisms, and related concepts. More connections mean more retrieval pathways, which means better memory.
Technique 5: Concrete Examples
Effectiveness: High
For every abstract concept you study, generate two or three specific, concrete examples. This is one of the most powerful yet underused study techniques.
How to Use Concrete Examples
If you are studying the economic concept of "opportunity cost," do not stop at the definition. Generate real examples: "The opportunity cost of spending four years in college is the income you could have earned working full-time during those years." Create examples from your own life and experience when possible.
Why It Works
Abstract concepts are difficult for the brain to store and retrieve. Concrete examples give your brain something tangible to anchor the abstract concept to. When you need to recall the concept during an exam, the concrete example serves as a retrieval cue that pulls the abstract definition along with it.
Technique 6: Dual Coding
Effectiveness: High
Dual coding means combining verbal information (words) with visual information (images, diagrams, charts). When you process information through two channels, you create two distinct memory traces instead of one.
How to Use Dual Coding
When studying a process (like the water cycle or a business workflow), draw a diagram while reading the text explanation. Create visual summaries of chapters using simple drawings, arrows, and spatial relationships. Pair key vocabulary terms with simple sketches or symbols.
Why It Works
Your brain has separate processing channels for verbal and visual information. When you encode the same concept through both channels, you double your chances of retrieving it later. If one pathway fails, the other can compensate.
Technique 7: The Feynman Technique
Effectiveness: High
Named after Nobel Prize-winning physicist Richard Feynman, this technique involves explaining a concept in the simplest possible terms, as if teaching it to a child.
How to Use the Feynman Technique
Choose a concept you are studying. Write an explanation using only simple words, no jargon. If you get stuck or find yourself relying on technical terms you cannot define simply, go back to your materials and fill the gap. Then try your explanation again.
Why It Works
The Feynman Technique reveals the difference between surface familiarity (recognizing a term) and deep understanding (being able to explain it). Most students mistake the former for the latter. This technique forces genuine comprehension, which produces much stronger memories.
Technique 8: Practice Testing
Effectiveness: Very High
Practice testing goes beyond active recall by simulating actual exam conditions. This includes taking practice exams, completing end-of-chapter questions, and creating and answering your own test questions.
How to Practice Test Effectively
Use past exams if available. Complete end-of-chapter review questions before looking at the answers. Create your own exam questions from your notes and answer them under timed conditions. Form a study group where each person creates questions for the others.
Why It Works
Practice testing combines the benefits of active recall with the added benefit of simulating the exam context. Research on "context-dependent memory" shows that memory retrieval is easier when the practice context matches the test context.
Technique 9: Distributed Practice
Effectiveness: High
Distributed practice means spreading your study over multiple sessions rather than concentrating it in one marathon session. This is related to spaced repetition but applies to your overall study schedule.
How to Distribute Practice
If you have ten hours to study for an exam, five two-hour sessions over five days will produce dramatically better results than one ten-hour session. Even three hours spread across three days outperforms six hours in one day.
Plan your study schedule backward from the exam date, allocating shorter, more frequent sessions rather than fewer, longer ones.
Why It Works
Each study session triggers memory consolidation during the sleep that follows it. More sessions mean more consolidation cycles. Additionally, the slight forgetting that occurs between sessions makes each subsequent retrieval more effortful and therefore more effective for strengthening the memory.
Technique 10: Self-Explanation
Effectiveness: Moderate to High
Self-explanation involves pausing during study to explain to yourself what you just learned, how it connects to what you already know, and why the steps in a procedure work the way they do.
How to Self-Explain
As you work through a textbook example problem, explain each step to yourself: "This step works because..." and "The reason we do this before that is because..." When reading a historical event, explain the causal chain: "This happened because of X, which led to Y."
Why It Works
Self-explanation forces you to identify and fill gaps in your understanding as you encounter them, rather than glossing over confusion. Students who self-explain consistently outperform those who simply read through material at the same pace.
How to Combine These Techniques for Maximum Effect
These techniques are most powerful when combined. Here is a practical study workflow that integrates the top strategies.
First pass (day 1). Read the material using the SQ3R method. Take notes using dual coding, combining written notes with diagrams and visuals. Practice elaborative interrogation by asking "why" and "how" after each section.
Same day review. Close your materials and practice active recall by writing down everything you can remember. Use the Feynman Technique to explain the key concepts in simple terms.
Spaced review sessions. Use spaced repetition to review your highlights and notes at increasing intervals. Interleave topics within each review session rather than reviewing one topic at a time.
Practice testing. As the exam approaches, shift to practice testing under realistic conditions. Use self-explanation to understand any problems you get wrong.
For capturing and reviewing your key highlights using spaced repetition, take a look at how to remember what you read for a comprehensive framework.
How Chapterly Automates the Most Important Study Technique
Of all ten techniques, spaced repetition consistently ranks as one of the most effective yet is also the hardest to implement manually. Tracking review intervals for hundreds of highlights across multiple courses is nearly impossible with spreadsheets or calendar reminders.
Chapterly automates this entire process. Save your most important study highlights and Chapterly schedules reviews at optimal intervals based on the science of the forgetting curve. Instead of spending time managing your review schedule, you can spend that time actually reviewing and learning. Each review session takes just a few minutes, but the cumulative effect is dramatic: you retain what you study for months and years instead of days.
Frequently Asked Questions
Why do I forget what I just studied even when I felt I understood it?
Understanding in the moment and remembering a week later are two different cognitive events. The first only requires that information stay in working memory long enough to make sense; the second requires successful encoding into long-term memory, which only happens reliably when you retrieve the information yourself. The "I get it" feeling during a lecture is fluency, not memory. The fix is closed-book retrieval within 24 hours of first exposure — see how to remember what you read.
Is rereading my notes ever useful?
Rereading is useful as a quick orienting pass before a retrieval session — 60 seconds to remember which topics the chapter covered. Beyond that, additional rereads return almost nothing per minute spent. Karpicke and Roediger's 2008 study showed that students who re-read four times performed barely better than students who read once, while students who tested themselves once after reading vastly outperformed both groups.
How long should a typical study session be?
Sustained high-effort retrieval is hard to maintain past about 90 minutes. Two 45–60 minute sessions with a real break in between will outperform a single 2-hour block, both because of attention and because the gap functions as micro-spacing. If you only have one block of time, use the Pomodoro structure (25-on, 5-off) to chunk it.
Do study apps actually help, or are they just procrastination tools?
It depends entirely on whether the app forces retrieval. Anki, Quizlet's learn mode, and Chapterly's spaced review sessions all force you to produce information from memory and grade your own performance. Note-organizing apps that store your notes prettily but never quiz you are productivity theater — they make studying feel organized without changing what produces retention.
How do I know if my study method is working before the exam?
Run a closed-book practice test under realistic conditions at least one week out. Whatever you cannot reproduce on a blank page is what you have not actually learned, regardless of how many hours you put in. The week of buffer gives you enough time to fix it. Students who skip this diagnostic almost always overestimate their preparedness — see active recall for why familiarity is not the same as recall.
Chapterly runs these techniques for you: retrieval prompts at the end of each chapter, then spaced reviews weighted toward the material you got wrong. Try it free.