The four passes, with timings
| Pass | Time | What you do |
|---|---|---|
| Survey | 5–10 min | Headings, figures, bold terms, summary, end-of-chapter questions |
| Question | 5 min | Turn every heading into a question you can't yet answer |
| Read | 60–75 min | Section by section, answering your questions, book closed at each break |
| Test | 20–30 min | End-of-chapter problems and your own questions, cold |
The fourth pass is the one people cut when time is short, and it's the one that does the learning. If you only have an hour, do a shorter read and keep the test — a partly-read chapter you've been tested on beats a fully-read one you haven't.
Survey before you read a word
Ten minutes spent finding out what the chapter is trying to do makes the reading substantially faster, because you know where each section sits in the argument rather than discovering it retrospectively.
- Read the summary first. Yes, the one at the end. It tells you what the chapter concluded, which is the context every paragraph needs.
- Look at the end-of-chapter questions before reading. They tell you what the author thinks matters, which is usually what the exam thinks matters too.
- Map the heading hierarchy. Three top-level sections with four subsections each is a very different chapter from twelve flat ones.
- Look at every figure. In science texts the figures often carry the argument, and the prose is commentary on them.
Turn the headings into questions
This is the step that converts reading from passive to directed, and it takes five minutes. "The sodium-potassium pump" becomes "how does the sodium-potassium pump maintain the gradient, and what happens if it stops?" Now you're reading to answer something rather than reading to have read.
Write them down — the list is your self-test for the fourth pass and the beginning of your revision material. It's the SQ3R skeleton, and the questioning step is the part that most people drop and the part that does the work.
Read in sections, with the book closing at each break
- 1
Read one section, marking only what you don't follow
Not what seems important — you can't tell yet. Mark confusions, which you can.
- 2
Close the book and answer that section's question
Out loud or in writing. Twenty seconds. This is the retrieval that makes the difference and it costs almost nothing.
- 3
Check your answer against the text
The gap between what you said and what it says is the actual content of the section, and it's invisible without this step.
- 4
Write one line of summary in your own words
In the margin or your notes. If you can't compress it to a line, re-read that section now rather than at the end.
- 5
Only then move to the next section
Reading ahead while a section is unresolved is how a chapter becomes a wall — each section usually assumes the last.
Handle the maths and the diagrams differently
Two kinds of content don't respond to reading at all and need their own treatment.
- Worked examples: cover the solution and attempt it first. Reading a worked solution produces a feeling of comprehension that vanishes on the next problem, and it's one of the most common wasted hours in technical study.
- Derivations: follow them with a pen, then reproduce the first three lines from memory. If you can't start it, you didn't follow it.
- Figures: redraw from memory, then compare. See how to study diagrams and figures — a redrawn diagram is worth ten looked-at ones.
- Tables of data: don't memorise the table, learn what varies and why. The trend is examinable; the twelfth row usually isn't.
Adjust the depth to why you're reading
Not every chapter deserves two hours, and the biggest efficiency gain in textbook work is deciding the depth in advance rather than starting every chapter at full intensity and running out of term.
| Purpose | Approach | Time |
|---|---|---|
| Background for a lecture | Survey plus figures only | 15 min |
| Core examinable material | The full four passes | 90–120 min |
| A topic you already half-know | Question pass, then test; read only where you fail | 30 min |
| Reference during problem sets | Don't read it; index it and search | As needed |
Come back once, briefly
A chapter studied properly and never revisited is largely gone in a fortnight. One short return visit — twenty minutes, a week later, questions only, book closed — converts a session's work into something that lasts to the exam.
That's the whole argument for spaced repetition applied at chapter scale: the second pass costs a fraction of the first and does most of the work of retention, provided the first pass produced questions to come back to.