What is Progress 8? A Simple Explanation

What is Progress 8?

Progress 8 is the government's headline measure of secondary school performance in England. It measures how much progress pupils make between the end of primary school (Key Stage 2) and their GCSE results at the end of Year 11 (Key Stage 4), relative to similar pupils nationally.

Progress 8 was introduced in 2016, replacing the previous headline measure of the percentage of pupils achieving five or more A*–C grades (including English and Maths). The old measure had significant flaws - it incentivised schools to focus resources on pupils just below the C/D borderline, while neglecting higher and lower achievers. Progress 8 is designed to give every pupil's improvement equal weight.

The measure is published for every state-funded secondary school in England and appears in the DfE's school performance tables. You will also find it on each school's page on School Signal.

How is Progress 8 Calculated?

The calculation has several steps, but the core idea is straightforward: a pupil's actual GCSE results are compared to the results achieved by other pupils who had the same Key Stage 2 (KS2) scores. If a pupil performs better than those comparators, they have a positive progress score. If they perform worse, their score is negative.

Step 1: The Baseline (Key Stage 2)

Every pupil's starting point is their KS2 results in English and Maths from Year 6. These are converted into a single average KS2 score. This score is used to group each pupil with a national cohort of pupils who had a similar starting point when they entered secondary school.

Step 2: Eight GCSE Slots

Progress 8 counts eight GCSE grades, arranged into three buckets:

1. English - English Language and/or English Literature (English counts double)
2. Maths - GCSE Mathematics (also counts double)
3. EBacc subjects - up to three further GCSEs from the EBacc: Sciences (Biology, Chemistry, Physics, or Combined Science), Computer Science, History, Geography, and Languages (French, German, Spanish, etc.)
4. Open slots - three further GCSEs from any approved qualification, including arts, humanities, vocational qualifications, and other EBacc subjects not already counted

The system automatically selects the highest-scoring qualifications within each bucket. This means if a pupil sits five EBacc subjects, only the three highest count. The school cannot cherry-pick which results to include - the calculation is standardised nationally.

Step 3: Points and Comparison

Each GCSE grade is converted to points (where grade 9 = 9 points, grade 8 = 8 points, and so on, down to grade 1 = 1 point). The pupil's total points across the eight slots are then compared to the average total achieved by all pupils nationally with the same KS2 starting score. The difference between the pupil's actual score and this expected score is their individual Progress 8 score.

A school's Progress 8 score is the average of all its pupils' individual scores.

What do Progress 8 Scores Mean?

The national average Progress 8 score is set at zero each year. A score of zero means pupils in that school made roughly the same progress as similar pupils elsewhere in England. Scores above zero mean better-than-average progress; scores below zero mean below-average progress.

As a rule of thumb:

• +0.5 or above: well above average - a strong result
• +0.1 to +0.5: above average
• 0 to +0.1: broadly in line with the national average
• -0.1 to 0: slightly below average - worth monitoring but not necessarily cause for alarm
• -0.5 or below: well below average - the DfE flags schools at this level as requiring attention

Scores are rarely much higher than +1.0 or lower than -1.0. The DfE considers a school to be significantly below average if the upper bound of its confidence interval falls below -0.5 for three consecutive years.

Confidence Intervals

Every school's Progress 8 score is published alongside a confidence interval - a range that reflects the statistical uncertainty in the measurement. Because school cohorts are finite (and sometimes small), there is always some margin of error in the figure.

A school with a headline score of +0.2 but a confidence interval of -0.1 to +0.5 cannot be said with certainty to be performing above average. The interval overlaps zero. Conversely, a school with a score of -0.6 and a confidence interval of -0.8 to -0.4 is performing significantly below average with high confidence.

When reading Progress 8 scores, always consider the confidence interval alongside the headline figure - especially for smaller schools where cohort sizes are lower and uncertainty is greater.

Limitations of Progress 8

Progress 8 is a useful and considerably more sophisticated measure than its predecessor, but it has real limitations that parents should understand.

It Does Not Measure Everything

Progress 8 captures GCSE performance only. It tells you nothing about a school's sixth form, its pastoral care, its culture, its extra-curricular offer, or how happy pupils are. A school could have excellent Progress 8 scores and still not be the right environment for a particular child.

The EBacc Bias

Because EBacc subjects form a significant part of the calculation, schools that prioritise arts, music, and vocational subjects in Years 10 and 11 may be disadvantaged compared to schools with a more traditional academic curriculum. A school with a strong creative arts culture might score lower on Progress 8 not because its teaching is worse, but because its curriculum choices lead to fewer EBacc grades counting.

Cohort Composition

The KS2 baseline adjustment is designed to make fair comparisons between schools with different intakes, but it is imperfect. Schools in areas of concentrated disadvantage, or those that serve particularly high proportions of pupils with complex needs, may find the adjustment does not fully account for the additional challenges their pupils face.

Year-on-Year Volatility

A school's Progress 8 score can fluctuate significantly from year to year, particularly in smaller schools where a single cohort of able (or less able) pupils can move the average substantially. A one-year dip is rarely as meaningful as a sustained trend over three or more years.

How to Use Progress 8 as a Parent

Progress 8 is best used as one data point among several, not as the definitive verdict on a school.

• Look at trends: Is the school's Progress 8 score improving, stable, or declining over the past three to five years? A consistent upward trend is more reassuring than a single good year.
• Compare like with like: A school serving a deprived area with a Progress 8 of 0 may be delivering excellent teaching. A selective grammar school with a score of -0.3 may be underperforming its advantaged intake significantly. Context matters.
• Use it alongside Attainment 8: Progress 8 tells you how much progress pupils made; Attainment 8 tells you the absolute level of achievement. Both together give a fuller picture.
• Cross-reference with Ofsted: A school rated Outstanding or Good by Ofsted but with a declining Progress 8 trend warrants careful attention - and vice versa.
• Read the school's performance data on School Signal: You can see Progress 8 scores for every state secondary on School Signal, alongside Ofsted ratings, attendance data, and much more.

See also our guide on What is Attainment 8? for the companion measure to Progress 8.