How Much Difference Does a Good School Make to Your Child’s Academic Achievement?

For at least 30 years genetic research has shown us that a significant determiner of who and what we are is genetically pre-determined.

This was recently confirmed by yet another study from Kings College in London:

“The degree to which students’ GCSE exam scores differ owes more to their genes than to their teachers, schools or family”

This research confirms that up to 60% of the differences in our children’s educational achievement is explained by inherited genes.  i.e. the DNA sequences we get from our parents at conception.  The rest is composed of a mixture of “nurture” type influences, such as parenting, schooling and peer group as well as a number of “random” life events, which are neither nature nor nurture.  The existing genetic research seems to indicate that peer groups is the biggest of these nurture influences and parenting made surprisingly little difference by the time we reach the age of 35.

I was very excited to read about new research that tries to understand the relative importance of schooling influences in the 40% which is nurture. For example, how much difference does a private school make compared to a State School?  How much difference does a good school make compared to a poor school?

This new research by the UK Government’s university funding body is based on the entire UK cohort who started university in 2007-08 (130,000 students) and graduated three years later. This huge study eliminates potential sampling biases and offers a robust and comprehensive examination of questions that smaller or institution-specific studies are unable to answer.  The study looked at how likely these students were to achieve firsts or 2:1s, depending on their background, and controlling for different academic grades.

The starting assumption to this study is that a student in a poor school getting the same grades as a student in a good school must be more intelligent, i.e. their superior intelligence had to compensate for their poorer academic environment.  So when they go to university the student from a poor school should do better when the are exposed to an identical academic environment.  If this was proven the study’s authors would have argued for lower offer grades by good universities to pupils from poor schools.

What did this research tell us?

1. Degree outcomes are not affected by the average performance of the school that a student attended. Specifically, a student from a low-performing school is not more likely to gain a higher degree classification than a student with the same prior educational attainment from a high-performing school. For example, regardless of ‘school type’, a student gaining AAB at A’ Level from a school in the highest 20 per cent of schools in the country has the same likelihood of gaining a first or upper second as a student gaining AAB from a school in the lowest 20 per cent of schools in the country. In both cases, the proportion gaining a first or upper second is 79 per cent. See key points 20 and 21 in the above reference.

2. Among students achieving A* and A grades at A’ Level, there was also  no statistical difference in degree attainment according to school type.

These are the grades required by elite Russell Group University applicants and Oxbridge candidates.  These data seem to back up the genetic theories that if a student is academically gifted the type of school he or she attends makes little difference to their academic achievement.  Your genes win out – at least in in an advanced, relatively socially mobile country with a good, national, free State education system.  It also seems to indicate that Oxbridge and Russell Group Universities should not be discriminating according to school type.  If they do they will dilute their high academic standards.

3. At the maximum differential, students educated at state school, achieving A-level grades of around BBC were 7% to 8% more likely to achieve a good degree than their private school peers with the same grades.

This seems to indicate that at best the standard of schooling can improve the performance of more “average” ability A’ level candidates by up to 8%.  This is much lower than I expected, considering the considerable perceived difference between good quality and poor quality schools.  However this seems to confirm the importance of other nurture influences on education, such as peer group.

4. A much smaller study by Exeter University found that someone achieving AAB at A’ Level from a low-performing school or college had the same potential to succeed as someone achieving AAA at a high-performing school.

Assuming that the differential between pupils from good or even average state schools compared to “a high performing school” is even less, it seems that the maximum benefit from a very expensive private education is a single grade increase in only one of three A’ levels.  In most cases it will be less than that.  Again it proves the majority of the educational ability is inherent to the child and independent of schooling.

Conclusions in a relatively socially mobile, developed country such as the UK:

1. The type of schooling makes no difference at all for the brightest students.

2. Russell Group and Oxbridge universities should not discriminate according to school type.

3. Schooling makes a small difference (8%) for A’ level candidates of more average ability.

4. For those Universities making offers around BBB and CCC grades there is a good case for offering pupils from poor performing schools slightly lower grades (e.g. BCC or even CCC instead of BBC).

5. Parents should look at these statistics before spending hundreds of thousands of pounds on a private education.  If their intention is to get significantly better A’ level results for their children they will be disappointed.  This is poor value for money.

These research results seem to back up existing research that concluded that schooling has a limited influence on educational achievement.  At best it makes up 8% of the 40% which is open to environmental influence.  For the brightest students it makes no statistical difference.  Peer group, parenting and random life events (i.e. events which are not nature or nurture) make up the rest of the 40%.

These results will be exaggerated by social engineers and class-war socialists in order to further their case against elitism and further their positive discrimination policies.

It should be noted however that these statistics are only made possible because of the excellent job done by British teachers. They contribute to making the UK a relatively equal society.   These studies show that British society is now “equal enough” to allow talent and motivation to be rewarded regardless of the type of schooling.  In other countries, where children are more poorly educated, the type of school a child attends will make a bigger difference to their academic achievement.

Even early school provision does not make the impact many expect.  Andreas Schleicher, head of the OECD’s education team has just published research showing that in a worrying number of rich-world countries more than 15% of young people are “unqualified”. Those with a problem include France, the Netherlands, Norway and Denmark—all high scorers for early-years provision. A good start is not enough on its own.

It is in our interest as a society that we have the best people in the right jobs. We all benefit from a genuine meritocracy. There should be no discrimination based on colour, class or sex. But this includes “positive” discrimination too. We should not be giving people a leg up because of a perceived injustice unless we can prove beyond doubt that they really have been disadvantaged.

Further listening on the genetics of intelligence:

Intelligence: Born Smart, Born Equal, Born DifferentThree BBC Radio programmes on the genetics of intelligence.

What makes some children smarter than others?  Professor Robert Plomin talks to Jim Al-Khalili about what makes some people smarter than others and why he’s fed up with the genetics of intelligence being ignored.


Pleiotropy across academic subjects at the end of compulsory education An article in Nature on the genetic effects to human intelligence and GCSE results in the UK.

Differences in degree outcomes: Key findings  (examines the extent to which a student’s background affects their chance of obtaining an upper second or first class degree)

Twins early development studies

Differences in students’ GCSE results owe more to genetics than environment:

IQ is in the Genes

We can’t ignore the evidence: genes affect social mobility

One Cause of Inequality: More Rich Marrying One Another

Marry Your Like: Assortative Mating and Income Inequality

Women, Men and the New Economics of Marriage

Why Poorer Students Are Underrepresented In Top Universities – an Evolutionary Perspective

Why is there an academic north-south divide in Britain?

How Much Difference Does a Good School Make to Your Child’s Academic Achievement?

Getting ’em young (The Economist looks at the impact of early years education)

Genetic influence on GCSE results

Genetics and general cognitive ability : Article : Nature

Genetics – How Intelligence Changes with Age

Access : Childhood intelligence is heritable, highly polygenic and associated with FNBP1L 

Genes may play role in educational achievement

Access : Genome-wide association studies establish that human intelligence is highly heritable and polygenic 

Genetic and environmental contributions to the covariance between occupational status, educational attainment, and IQ


7 thoughts on “How Much Difference Does a Good School Make to Your Child’s Academic Achievement?

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  6. Your post is very interesting. I am a teacher and I try to be informed for the latest researches about educational themes. I have also liked your comments on the results and I agree with you to the most of them!

    • Thank you. It should be noted however that these statistics are only made possible because of the excellent job done by UK teachers. They contribute to making the UK a relatively equal society with allows talent and motivation to be rewarded regardless of the type of schooling. In other countries, where children are poorly educated, the type of school a child attends will make a bigger difference.

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