What changes when the book is open
Recall questions vanish. Nobody asks you to define a term when the definition is in front of you. What's left is application, synthesis and evaluation — the questions where knowing the definition is the *starting* point and the marks are somewhere past it.
Time pressure also gets worse, not better, because students spend it searching. The single most common way to fail an open book exam is to spend forty minutes looking things up and twenty minutes writing.
How to actually prepare
- Know the material as if it were closed book. This is the whole answer, and it is unwelcome. Your notes are for checking a detail, not for learning the subject during the exam.
- Build a navigation layer, not a content layer. A one-page index — topic, where it is, page number — is worth more than fifty pages of beautiful notes you cannot find anything in.
- Practise with the clock and the materials together. The skill of deciding *not* to look something up is trained, and it is the one that saves you.
- Prepare structures, not facts. For essay-style opens, a skeleton argument for each likely question is legal, portable, and enormously faster than composing under pressure.
The one-page index is the trick
Sit down before the exam and write a single sheet: every major topic, one line on what it says, and where to find the detail. Building it is genuine revision — it forces you to survey the whole course — and using it in the exam turns a four-minute search into a fifteen-second one. This is the highest-leverage hour you will spend.