Most Study Advice Is Wrong
Highlighting textbooks, rereading notes, and cramming the night before an exam are among the most popular study strategies and also among the least effective. Decades of cognitive science research have identified specific techniques that dramatically improve learning and retention, yet most students continue to rely on methods that feel productive but produce mediocre results.
Here are seven techniques that actually work, ranked by the strength of evidence supporting them.
1. Spaced Repetition
The spacing effect is one of the most robust findings in all of cognitive psychology. Distributing your study sessions across multiple days produces significantly better long-term retention than concentrating the same total study time into a single session. A student who studies for 30 minutes on four separate days will remember more than a student who studies for two hours in one sitting.
The mechanism is straightforward: each time you revisit material after a gap, your brain has to work harder to retrieve it. This retrieval effort strengthens the memory trace and makes future retrieval easier. Apps like Anki and RemNote automate the spacing process by scheduling review sessions at optimal intervals based on your performance.
2. Active Recall
Instead of passively rereading notes, close your materials and try to recall the information from memory. This can be as simple as covering a page of notes and trying to write down everything you remember, or as structured as creating flashcards and testing yourself systematically.
A landmark 2011 study published in Science found that students who practiced retrieval (active recall) remembered 50 percent more material one week later compared to students who used other study techniques, including concept mapping and rereading. The testing effect, as researchers call it, works because the act of retrieving information from memory is itself a powerful learning event.
3. Interleaving
Most students practice problems by doing a block of one type before moving to the next. Interleaving means mixing different types of problems or topics within a single study session. This feels harder and less efficient in the moment, but research consistently shows it produces better performance on tests that require applying knowledge to novel situations.
For example, instead of practicing 20 calculus integration problems followed by 20 differentiation problems, mix them together randomly. The struggle to identify which technique applies to each problem strengthens the discrimination and flexible application skills that exams actually test.
4. Elaborative Interrogation
Ask “why” and “how” about everything you learn. When you encounter a fact, force yourself to explain why it is true and how it connects to things you already know. This technique works because it creates meaningful associations between new information and existing knowledge, providing multiple retrieval pathways to the same memory.
Instead of memorizing that “the mitochondria is the powerhouse of the cell,” ask yourself why cells need a dedicated organelle for energy production, how the mitochondria’s structure facilitates its function, and what would happen if mitochondrial function were impaired. The answers you generate — even if imperfect — create a richer, more durable memory than rote repetition.
5. The Feynman Technique
Named after physicist Richard Feynman, this technique involves explaining a concept in simple language as if teaching it to someone with no background in the subject. The process of simplifying forces you to identify gaps in your understanding that are invisible when you are passively reading about the topic.
Write the concept at the top of a blank page. Explain it underneath using only simple words and analogies. When you get stuck or find yourself reverting to jargon, you have identified an area that needs more study. Return to your materials, fill the gap, and try explaining it simply again.
6. Dual Coding
Combine verbal information with visual representations. When studying a concept, create a diagram, sketch, flowchart, or mind map alongside your written notes. The dual coding theory, supported by extensive research, shows that information encoded in both verbal and visual formats is more easily retrieved than information encoded in only one format.
You do not need artistic skill for this to work. Simple stick figures, boxes with arrows, and color-coded diagrams are sufficient. The act of translating verbal information into a visual format forces a level of processing that passive reading does not require.
7. Practice Testing Under Exam Conditions
Full-length practice tests taken under timed, exam-like conditions are among the most effective preparation methods available. They accomplish several things simultaneously: they activate retrieval practice, reveal knowledge gaps, reduce test anxiety through familiarity, and build the time management skills needed for actual exams.
The key is creating realistic conditions. Sit at a desk, set a timer, put your phone in another room, and do not check your notes until the practice test is complete. The closer the practice conditions match the actual exam environment, the more effectively the preparation transfers.
Why These Techniques Feel Harder
Every effective study technique on this list shares a common characteristic: it feels more difficult than the alternatives. Active recall feels harder than rereading. Interleaving feels more confusing than blocked practice. Spaced repetition feels less productive than cramming. This difficulty is not a flaw — it is the mechanism. Learning happens at the edge of your current ability, and techniques that keep you in this productive struggle zone produce the best outcomes.
The comfort of highlighting and rereading is seductive, but comfort and learning are often inversely correlated. Embrace the struggle, trust the science, and watch your results improve.