DS is very bright and motivated and studies advanced maths (A level content) at home during GCSE years, does very well in maths olympiad, etc. He is going to a top independent school with a 6th form which offers a plethora of A level subjects that interest him. At his school usually bright students who want to pursue science/engineering at uni will take up to 5 A level subjects, 2 of which will be maths and further maths. DS thinks using up 2 slots for maths/FM will be a waste of time since he already knows most of the material now and can just revise for the exams at home on his own in the coming years, and maths doesn't involve practical work, trips to historic sites, etc that he would be missing out on. (I myself have postgraduate degree in engineering and can guide him in maths if need be.) He is very interested in humanities as well as science so his ideal A level subject choices at school would be Physics, Chemistry, Computer Science, Latin, and History. Does this sound like a feasible idea? Should I let his school know in advance that he will revise for the maths/FM exams at home and just take the exam at the end? Is there a chance the school may look unfavourably upon this and insist he must do maths at school to take the A level exams? In general is it common for students at top schools to take A level exams for subjects they studied at home instead of in school, assuming there was no coursework requirement for the A level? Thank you for any advice.