Thanks for all your useful comments.
I didn't know this but now I recognise that they do have this
Accelerated Reader system in place
and there is a problem with it.
In my son's year 7 they have a "library" lesson once every two weeks where they are expected to choose and read something from the group of books assessed as suitable for them.
My son says there is nothing in that group that appeals, so he hasn't read anything and he has only bought these books home because he had to take something.
That whole lesson is a waste of time, not just for my son by the sound of it.
This is not a system to encourage reading, if anything it is the opposite. Being forced to choice from a small sample of unappealing books when there are so many other good books ...
Then there are quizzes. My son has not taken any - he told me. He doesn't see the point of them. He did say some of the boys are very enthusiastic about the quizzes and they take them based on having watched the films, eg the Hunger Games - obviously none of them are able to actually read the Hunger Games - it would be far too difficult for most of those boys and they are expected to read Adam Blade!
Any boys who were good at reading and wanted to read Beast Quest would have read those books many years before arriving in year 7.
My son tells me Diary of a Wimpy Kid is in the next level up from where he is assessed at - he would choose them but obviously he is never going to move up to that level as he isn't joining in the system.
Again - he has has read them all anyway and started on them about 2 or 3 years ago!
Some one else mentioned children whizzing through books they have read before or even the Mr Men books.
I am amazed that anyone could really think this is a good thing for MOST children. Yes it might be great for a minority with particular reading problems.
Also remember son was assessed as having one of the highest reading ages in his year group, among the boys (2 years above his age).
Perhaps there is something I have missed but I will take this up with the head teacher.