If you're looking at British schools for your child, you must have heard of the Attainment 8 score by now.
Attainment 8 is a measure of how well pupils have achieved across eight qualifications - usually the GCSE, though not necessarily.
Through a formula that doubles the weight of math and English, each pupil may score a maximum of 90 - the top mark of 9 for each of the eight GCSEs would land you a score of 72, and another 18 points may be given for the double-weighted math and English marks.
The Attainment 8 is then published at a school level by taking the average scores of its students.
Government statistics show the average Attainment 8 score in England in the 2019-2020 year was 50.2.
What's interesting among these stats is that pupils from the Chinese ethnic group had the highest score of 67.6 out of all groups. On the other hand, White Gypsy and Roma pupils only scored 23.3. In terms of gender, girls also scored higher than boys on average.
By area, some popular neighborhoods among Chinese and Hongkongers, such as Barnet and Kingston upon Thames in London, also come out at the top. Barnet, with a score of 60.1, comes second just after Sutton (61.3), while Kingston ranks fourth with a score of 58.9.
Of course, numbers don't mean everything, and when it comes to choosing the best school, there is no one-size-fits-all.