Using past questions well

Past questions are among the most popular tools for UTME, WAEC and NECO preparation, and for good reason. Practising retrieval under exam-like conditions is one of the best-supported learning strategies in cognitive psychology. Yet many students use past questions in a way that gives little benefit: reading questions with the answers visible, or memorising answers to specific questions. This article explains why testing works and how to use past papers properly.

Why testing yourself works

In a well-known experiment, Roediger and Karpicke had students either reread a passage several times or read it once and then take recall tests. After five minutes, rereading looked slightly better. After a week, the students who had tested themselves remembered substantially more. The effort of retrieving information strengthens the memory itself, and it also shows the student honestly what they do not yet know. Rereading feels productive but often produces an illusion of mastery.

Common mistakes

• Looking at the answer before attempting the question.
• Memorising the answers to specific questions instead of the principle behind them.
• Doing many papers without reviewing the mistakes.
• Practising only favourite subjects or topics.
• Never practising under timed conditions.

A method for each paper

First, attempt the paper or section under real conditions: timed, without notes, on the same kind of screen or answer sheet you will use. Second, mark it honestly. Third, and most important, sort every wrong or guessed answer into a reason: a gap in knowledge, a misread question, a careless slip or running out of time. Each reason has a different remedy. Gaps send you back to the syllabus topic; misreading calls for slower reading of the stem; time problems call for practice in pacing.

Keep an error log

An error log is a notebook or spreadsheet where each mistake is recorded with the topic, the reason and the correct reasoning. Reviewing it weekly turns scattered mistakes into a clear list of priorities. Over time the log should shrink in some areas and reveal stubborn weaknesses in others, which is exactly the information a tutor needs to help.

Spacing and mixing practice

Two further findings from learning research improve past-question practice. Spacing means returning to a topic over several weeks instead of finishing it in one long session. Interleaving means mixing different types of question in one practice set, so the student must first recognise which method a question requires. Both feel harder than blocked practice, but both produce better long-term results, as reviewed by Dunlosky and colleagues.

A practical weekly pattern is to study new topics early in the week, then on one or two days take a mixed set of past questions covering both new and older topics, followed by a full timed paper every few weeks.

Use the syllabus as the map

Past questions show the style and difficulty of an examination, but the official syllabus defines what can be asked. A student who prepares only from past papers may miss topics that have not appeared recently. The best approach combines both: study each syllabus topic, then test it with past questions, then log and repair the mistakes. Steady cycles of this kind over months are what produce strong results.