Standardised scores help parents understand how a child’s test performance compares with other pupils. Instead of showing only how many questions a child answered correctly, the score converts their raw mark onto a common scale. Depending on the assessment, it may also account for the child’s age or the performance of a wider reference group.
They are especially common in 11 Plus and GL Assessment tests. However, KS2 SATs use scaled scores instead.
Standardised scores convert raw test marks onto a common scale so that results can be compared more fairly. On many age-standardised assessments, 100 represents the average score. However, a score of 100 is not automatically a pass mark, particularly in the 11 Plus, where entry requirements vary between schools and areas.
How Do Standardised Scores Work?
A raw score is simply the number of marks a pupil earns in a test. For example, if a child answers 38 out of 50 questions correctly, their raw score is 38.
However, raw marks do not always allow fair comparisons. One test may be harder than another. Children taking the same test may also be different ages.
Standardised scores take a raw result and place it on a common scale. This makes it easier to see how a pupil performed compared with an appropriate group of other pupils.
Here is the basic difference:
| Score Type | What It Means |
| Raw score | Number of marks earned |
| Percentage | Share of available marks earned |
| Standardised score | Raw performance converted to a common scale |
| Percentile | Position compared with other pupils |
This distinction matters because a raw score of 70%, for example, does not automatically equal the same standardised result across different tests.
Standardised Scores Explained for Parents
When parents receive a test result, they may focus first on whether the number looks high or low. However, the first question should be: what scale does this assessment use? Many age-standardised assessments use 100 as the average score. Therefore, a result close to 100 usually shows performance around the average for the relevant comparison group.
A simple guide might look like this:
| Standardised Score | General Meaning |
| Below 85 | Below the broad average range |
| 85–99 | Within the broad average range, below the mean |
| 100 | Around the average |
| 101–115 | Within the broad average range, above the mean |
| Above 115 | Above the broad average range |
These ranges help parents understand a result. However, they do not represent fixed 11 Plus admission boundaries.
Parents may also see a percentile alongside the score. For example, a percentile rank of 75 means the pupil performed as well as or better than roughly 75% of the comparison group.
As a result, percentiles can sometimes make a score easier to understand than the number alone.
Raw Scores vs Standardised Scores
Raw scores tell you what happened on the test itself. Standardised scores add context.
Imagine two pupils complete different versions of a test.
One scores 42 out of 50, while the other scores 38. At first, the first pupil appears to have performed better. However, if the second test was more difficult, the difference may become smaller after standardisation.
Age can also affect the result in assessments that use age adjustment. Therefore, two pupils with the same raw mark can sometimes receive slightly different standardised scores.
This is why parents should avoid comparing practice-paper percentages directly with official standardised results. A score of 80% on a practice paper does not necessarily translate into a particular standardised score in the real assessment.
11 Plus Standardised Scores Table
Parents often search for a 11 plus standardised scores table because they want to know whether their child has achieved a grammar school pass mark.
There is no single national score that guarantees entry.
Still, the following table can help parents understand the scale:
| Score | Broad Interpretation |
| Below 100 | Below the average of the comparison group |
| Around 100 | Around average |
| 105–110 | Above average |
| 110–120 | Strong performance on many standard scales |
| 120+ | Very strong performance on many standard scales |
This table is only a general interpretation. It is not a grammar school admissions table.
11 Plus requirements vary by:
- school
- region
- grammar school consortium
- exam provider
- number of applicants
- admissions policy
- catchment rules
Some schools set a qualifying score. Others rank applicants and offer places to the highest-scoring children. Therefore, a score that is enough for one grammar school may not be enough for another.
Parents should always check the current admissions information for the school they are considering.
For a wider overview of selective entrance exams, the 11 Plus exam guide explains the test process, subjects and preparation in more detail.
Why Age Standardisation Matters
Children in the same school year can be almost a year apart in age.
For example, one child may be born near the start of the school year. Another may be born near the end. At primary school age, this gap can affect skills such as speed, vocabulary and confidence. Age standardisation helps make the comparison fairer.
Instead of comparing every pupil in exactly the same way, the test compares children with others of a similar age. However, younger pupils do not simply receive a fixed number of extra marks. The test provider adjusts the raw result using its own standardisation method.
As a result, age standardisation makes scores fairer to compare without changing what the child achieved in the test.
GL Assessment Age Standardised Scores
These results appear as Standard Age Scores, or SAS.
According to GL Education, these scores compare a pupil with children of the same age. A score of 100 is the average. This matters because children in the same school year can be different ages. As a result, a younger pupil may get a slightly different score from an older pupil with the same raw mark.
The important point is that GL age standardisation is about score interpretation, not the structure of the GL 11 Plus itself.
Parents who want to understand question types, subjects and preparation should instead read the dedicated GL Assessment 11 Plus guide.
How Are Standardised Scores Calculated?
The exact method varies by test provider, but the main steps are similar.
First, a pupil takes the test and gets a raw score. Next, the provider compares that score with a reference group. It then converts the result onto a common scale. Some tests also adjust the score for the child’s age. So, the final result is more than just a percentage.
The process can be summarised as:
Raw score → comparison with reference group → adjustment where required → standardised score
Parents can also read GL Education’s explanation of how providers convert a raw score into a standardised score.
Standardised Scores Formula
A simplified standardised scores formula can help explain the idea:
Standard score = 100 + 15 × ((raw score − mean score) ÷ standard deviation)
This type of formula places results around an average score of 100. However, parents do not need to calculate this themselves.
Real assessment providers may use more detailed methods. For example, they may work with different age bands, national test data and test-specific reference samples.
Therefore, the formula is best understood as an illustration of how raw results can be placed onto a common scale.
It should not be used to predict an official 11 Plus result from a practice-paper score.
What Is a Good Standardised Score?
There is no single answer.
On many standardised assessments, 100 represents the average. Therefore, a score above 100 normally means that the pupil performed above the mean of the relevant comparison group.
However, “above average” and “good enough for grammar school entry” are not the same thing.
An 11 Plus result should always be interpreted alongside the admissions rules for the particular school or area.
Parents should check:
- if the school uses a qualifying score
- how applicants are ranked
- whether catchment rules apply
- how individual test sections affect the result
- what oversubscription criteria may influence places
This is why it is risky to rely on a universal 11 Plus pass score found online.
Instead, use practice results to identify strengths and weaknesses.
For example, if a child’s overall score is strong but their Verbal Reasoning performance is consistently lower, that tells you where preparation may be most useful.
The 11 Plus preparation guide provides more detail on building an effective study plan.
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Book a free trialAre SATs Scores Standardised?
Parents sometimes search for sats standardised scores, but KS2 SATs officially use scaled scores.
The principle is related because raw marks are converted onto another scale. However, SATs scaled scores should not be treated as the same scoring system used in age-standardised 11 Plus assessments.
For KS2 tests, a scaled score of 100 represents the expected standard.
Parents searching for 2026 standardised scores ks2 should therefore use the official terminology and look for the government’s 2026 scaled-score conversion tables.
The official 2026 scaled scores KS2 tables show how raw marks were converted for that year’s tests.
This article focuses only on that scoring distinction. SATs subjects, test structure, preparation and how secondary schools use SATs results are separate topics.
How to Use Standardised Scores During 11 Plus Preparation
A standardised score is most useful when it helps identify what to work on next.
Parents should avoid turning every practice result into a target admissions score. Practice resources may use different levels of difficulty and different scoring systems.
Instead, look for patterns over several tests.
For example:
- Does Maths stay consistently strong?
- Does vocabulary lower the English score?
- Are Verbal Reasoning errors caused by timing?
- Does Non-Verbal Reasoning improve with repeated practice?
Those patterns are often more useful than a single number.
A child who repeatedly struggles with one area may benefit from focused support from 11 Plus Maths tutors or 11 Plus English tutors.
Likewise, families can find specialist Verbal Reasoning tutors and Non-Verbal Reasoning tutors when a specific skill needs more attention.
How Edumentors Can Help
Standardised scores can show where a child is performing well, but they can also highlight gaps that need more attention.
Edumentors connects pupils with tutors from top UK universities. A tutor can help identify weaker areas, practise exam techniques and build a more focused preparation plan. Families who want broader support can explore 11 Plus tutors and choose a tutor based on their child’s goals and learning needs.
The aim is not simply to chase a particular score. Instead, good preparation should help a child improve their knowledge, confidence and exam technique.
FAQs
What Are Standardised Scores?
Standardised scores turn raw marks into a common score. This makes results easier to compare with other pupils. Some tests also consider a child’s age. On many age-standardised tests, 100 is the average score. However, parents should still check how each test provider reports results.
How Are 11 Plus Standardised Scores Calculated?
A pupil first gets a raw score based on the marks they earned. The test provider then compares this score with a reference group. It converts the result onto a standard scale. Some 11 Plus providers also adjust scores for a child’s exact age. Because methods vary, practice-paper percentages cannot reliably predict the final standardised score.
What Is a Good Standardised Score for the 11 Plus?
A score above 100 is above average on many standardised scales. However, there is no single 11 Plus pass mark. Grammar schools and regions use different rules and score limits. As a result, a strong score in one area may not be enough in another. Parents should always check the latest admissions rules for each school.
Are SATs Standardised Scores the Same as Scaled Scores?
No. KS2 SATs use scaled scores. A score of 100 means the pupil has met the expected standard. The 11 Plus can use a different system. It may compare a pupil with a reference group and also adjust for age. So, although the systems are similar, the terms do not mean the same thing.
Why Does GL Assessment Use Age Standardised Scores?
Age standardisation helps make score comparisons fairer for children of different ages. GL’s Standard Age Score compares a pupil with other children of a similar age. This gives parents more context than the raw mark alone. It also reduces the effect of age differences on the final result.
