It does unlock extra resources, there are internet resources only available to children who have the Maggot label.
it is an ofsted requirement that schools identify their most able children and show that they are differentiating for them. This creates far more paperwork than it does actual educational benefit, so schools tried to keep the numbers down to limit paperwork. This is when the 10% minimum was brought in. Schools HAVE to list a minimum of 10% of students as MAGGOT, even, for example MLD schools, even PMLD schools, were the children are so disabled a 10 year old can get on the register simply be being able to clap his hands.
This has always been a nonsense. A maths teacher, for example, could have say 4 students in his year 10 class on the MAGGOT register. He has to show that they are being treated differently and achieving more. One of them might be a maths genius. One could be on the register because he once painted a decent picture in art, a couple of years ago. One could be on the list because he is a star of the school football team. One could be on the list as a legacy from a previous school or teacher, and no one has the faintest clue why.
So, therefore, on top of the differentiation being done for individuals finding this current topic easy or difficult, and on top of the interventions being put in for those who are underachieving at any level, ( many pupils will be achieving or capable of achieving higher than the MAGOT children) the teacher also has to treat this disparate group together, who may have nothing in common, dislike each other, not work well together and all be at totally different standards in maths.
Like I said, my previous school got the best of both worlds by listing EVERY SINGLE PUPIL as MAGOT.
This meant they were all entitled to access the internet resources.