It is argued that the grammar school system is divisive[REF][REF] and that the system leads to a waste of talent in those that fail the exam at age 11 [REF].
LEAs with a fully selective education system have a higher proportion of schools in the National Challenge, that is, schools that don't meet the government's floor target of 30% of students achieving at least 5 GCSE grades A*-C including English and Maths.