“Attainment 8 is a way of measuring how well children do in key stage 4, which they usually finish when they are 16 years old.
The 8 subjects which make up Attainment 8 include English and maths. Out of the remaining 6 subjects:
• 3 must come from qualifications that count towards the English Baccalaureate (EBacc), like sciences, a language and history
• 3 qualifications can be either GCSE qualifications (including EBacc subjects) or technical awards from a list approved by the Department for Education
Each grade a pupil achieves is assigned a point score from 9 (the highest) to 1 (the lowest).
A pupil’s Attainment 8 score is calculated by adding up the points for their 8 subjects, with English and maths counted twice. A school's Attainment 8 score is the average of all of its eligible pupils’ scores”. (DfE)