§03

how learning actually works

Most of what people believe about studying is wrong, and the corrections have been sitting in the literature for decades. The methods that feel effective are usually the ones that are not, because fluency feels like knowledge and is not.

Learning styles are not real. Start there.
The belief that a person is a visual, auditory or kinaesthetic learner and should be taught accordingly is the most widespread idea in education and one of the most thoroughly refuted. Reviews looking for the meshing effect — better outcomes when instruction matches the stated style — have not found it. Matching the material to the subject beats matching it to the person: learn geography from a map, learn pronunciation by listening. the evidence on learning styles
Testing yourself is studying. Rereading is not.
Retrieving something from memory strengthens it far more than seeing it again. Rereading produces a strong sense of familiarity and very little durable recall, which is why it remains the most popular method: it feels good and does almost nothing. Close the book and write down what you remember, then check. the testing effect
Spread the same total hours across more days.
Ebbinghaus measured this in the 1880s and it has survived every attempt to overturn it since. The same study time distributed over a week beats the same time massed into one session, by a wide margin, on anything measured more than a day later. Cramming works for tomorrow morning and almost nothing beyond it. the spacing effect
Mix problem types instead of doing twenty of the same.
Blocked practice — all the division problems, then all the multiplication — makes each session feel smooth and teaches you to apply a method you were already told to use. Interleaving forces you to work out which method applies, which is the part the exam and the job actually require. It performs worse during practice and better on the test. interleaving
If it feels easy, it is probably not working.
Robert Bjork's phrase for this is desirable difficulty. Conditions that slow acquisition down — spacing, interleaving, retrieval, varying the context — reliably improve long-term retention, while conditions that make practice feel fluent reliably damage it. The uncomfortable implication is that your sense of how well a session went is close to inversely correlated with how much you learned. desirable difficulties
Explain it to someone who does not know it.
Feynman's method, and it works for an unglamorous reason: fluent prose has nowhere to hide. The moment you have to produce a sentence that a beginner would accept, every gap you had been stepping over becomes a place where you cannot write the next word. the Feynman technique
Words and pictures together, not words or pictures.
Dual coding is the idea that survived when learning styles did not. Presenting the same content verbally and visually helps most people, not because some are visual learners, but because the two channels are processed separately and reinforce each other. This is a claim about how memory is built, not about what type of person you are. dual coding