BBC article on L6 SATs
The article says "The 'brainbox' tests were sat by about one in nine Year 6 pupils in maths, and one in 11 in English this year, according to the Department for Education."
But next it states "Children sat the new tests in one in 12 schools in England."
If only 8% of schools are offering the tests, and I would assume those schools will only over the L6 tests to their top cohort (maybe 10%-40%, depending on the school); then how can the tests have been sat by one in nine pupils?