Practising the wrong exam format
Different regions and schools use different tests, and the formats vary in subjects, style and timing. Practising the wrong one wastes effort and can knock confidence on the day. Confirm exactly what your target schools use before you buy materials or set a plan, then practise in that style.
Leaving it too late
Cramming rarely works for the 11 Plus, because the papers reward a fluency that builds slowly. Starting late forces long, tiring sessions that raise stress and reduce how much sticks. Steady, regular practice over many months beats a frantic final term.
Relying only on practice papers
Practice papers are useful, but doing them on repeat can teach pattern spotting rather than real understanding. A child may learn to recognise a question format without grasping the reasoning behind it. Mix focused topic work with full papers so understanding and exam technique grow together.
Ignoring the weakest subject
It is tempting to keep practising the subject your child enjoys and is already good at. Marks are usually easier to gain in a weaker area, though. Use mock results to find the gaps, then spend your limited time where it makes the biggest difference.
Applying too much pressure
Too much pressure leads to anxiety, lost confidence and burnout, none of which help on exam day. Keep sessions short and positive, protect sleep, free time and exercise, and praise effort rather than only results. A calm child performs closer to their best.
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