11-Plus Preparation: GL Assessment vs CEM — Key Differences Explained

Families preparing for the 11-plus often discover late that the exam is not one exam. Different grammar schools and consortia have used different assessment formats, and preparing for the wrong one wastes months of work.

The formats differ in structure, in what they weight, and in how predictable they are — which means the right preparation strategy differs too.

The two broad approaches

Historically, 11-plus assessments have fallen into two camps.

One approach uses clearly delineated papers with published question types, so families know in advance which categories of verbal and non-verbal reasoning will appear. Preparation can therefore be systematic: work through each question type, identify the weak ones, drill those.

The other approach deliberately blends question types within papers and varies the emphasis between sittings, with the stated aim of making the test harder to coach for and more reflective of underlying ability. Vocabulary tends to carry more weight, and timing is often tighter.

Why the difference matters for preparation

• A format with published question types rewards systematic practice of each type in turn.
• A blended, less predictable format rewards broad reading, strong vocabulary and comfort with unfamiliar question shapes.
• Timing strategies differ: one rewards steady pacing per section, the other rewards adaptability within a mixed paper.
• A student drilled narrowly on one format can be genuinely disadvantaged by the other.
• Practice books are written for a specific format, so buying the wrong set wastes both money and preparation time.

Preparation that works for either

Some ground is common to both, and it is worth building early regardless of which format your child will face.

Wide reading builds the vocabulary that every format tests, directly or indirectly, and it is the single highest-return activity in the whole process. Mental arithmetic fluency helps under time pressure regardless of paper structure. And comfort with being timed — genuinely timed, not approximately — is worth building early, because it is the variable that most often separates practice performance from exam performance.

Verbal and non-verbal reasoning

Both formats test reasoning that sits outside the normal school curriculum, which is why it catches families by surprise. A child who is doing well at school may never have encountered a non-verbal reasoning question before starting 11-plus preparation.

This is not a gap in their education — it simply is not taught. The implication is that some explicit exposure is necessary, and that early panic about poor initial scores is usually misplaced.

A note on pressure

The 11-plus arrives at an age when children vary enormously in maturity, and a result on a single morning reflects that as much as it reflects ability. Preparation that builds reading, reasoning and confidence has value whatever the outcome; preparation built purely around a test date often does not.

Common questions