Every semester, some fraction of 1Ls hears open book and relaxes, and some fraction hears closed book and panics, and both have misread the variable. The difference between open and closed book law school exams is real but small, because the thing that makes the exam hard, fifteen issues in three timed hours, is untouched by what sits on your desk. An open book exam is not a reference exercise; it is a time pressure exam on which looking things up is a losing strategy, and the medians on both formats sit exactly where the curve puts them.

Why the book barely helps

Run the arithmetic. A three hour issue spotter allocates roughly ten minutes per analyzable issue, and every consultation of your materials, find the section, read, reorient, costs two to four of them. Look things up five times and you have donated an entire issue's analysis to the desk copy.

Worse, the skills the exam actually grades, spotting the issues, triaging weight, applying facts, arguing both sides, per the A exam teardown, cannot be looked up at all: no outline consultation reveals that the neighbor's tip raised an indirect revocation fight. The book is a safety net for one thing, retrieving a precise rule formulation you flagged in advance, and a trap for everything else.

What changes in preparation

Both formats require the same internalization, the full pipeline of master outline, attack outline, memory sheet, because triage runs from the head in either room. The difference is one added layer each. Closed book adds a memorization layer: the memory sheet drilled until you can reproduce it cold, plus exact rule statements for the doctrines your professor tests verbatim.

Open book adds an organization layer: the attack outline printed and tabbed, a one page index, page numbers, and a marked set of the precise formulations you might genuinely retrieve, built so any lookup completes in twenty seconds. Note what the open book layer is not: it is not bringing more. The students hauling casebooks and fifty page masters into open book exams are carrying weight they will never open, and the ones flipping through it mid exam are losing to the ones running a two page checklist from memory.

What changes in the room

Closed book: the brain dump, first five minutes, memory sheet onto scratch paper, then the exam proceeds per exam strategy with the sheet as your checklist. Open book: the same opening minus the dump, the attack outline serving as the checklist, and one standing rule for the desk copy, lookups only for pre flagged precise formulations, budgeted, never for wayfinding. In both rooms, the five step read from issue spotting and the time allocation math run identically, because the format never touched them.

The variants and the rules

Formats come in flavors: limited open book, own outline only is common, so read what counts as your own; open everything including internet, rare, same arithmetic, the search engine is slower than your attack outline; and the take home or eight hour exam, which is genuinely different, there the binding constraint flips from time to word limits, over writing becomes the failure mode, and triage becomes editorial. Whatever the flavor, the professor's official materials rule is law with honor code stakes: confirm it from the written instructions, not section rumor, as part of the logistics pass in finals week, and when annotations, tabs, or shared documents sit in a gray zone, ask before exam day rather than litigate after.

FAQ

Are open book exams easier?

The medians say no, and plenty of students find them harder, because the format tempts exactly the behavior, mid exam research, that time pressure punishes. Prepare identically, add the organization layer, and treat the book as insurance.

Should I bring the casebook to an open book exam?

Almost never; it is the slowest document you own and its job ended weeks ago. The working set is the tabbed attack outline, the master outline as deep backup, and the marked formulations list.

For closed book, how much do I actually memorize?

The memory sheet's skeleton, the elements of every doctrine on it, and exact phrasings only where your professor demonstrably rewards them. Memorizing the fifty page master is neither possible nor the assignment; the exam tests deployment, not recitation.

Written by Ali, Georgetown Law, founder of Lovare Institut.

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