Just sense checking really
DS is choosing GCSE options, his school do a 3 year KS4 so he is currently year 8.
Most kids in the school sit 10 GCSEs at the end of year 11. He has the option of taking statistics which he would sit at the end of year 10. He would then be timetabled to have supervised free periods in year 11 and sit 9 GCSEs at the end of that year.
If he didn’t do statistics he would probably do music - so a big lump of course work and another set of exams in year 11.
He is able, motivated and hardworking (well at the moment)
A subject less in year 11 seems a good idea to me - but am I missing something?