Re: My Experience So far of the youth entering education
Any teenager should be encouraged to do at least one of Drama, Music, or Dance at GCSE if their school has any serious capability in those areas (i.e. talented teachers and, less importantly, facilities). From my experience with 3 strongly academic kids (lots of A* etc) these subjects benefit them greatly in developing self-confidence, concentration, planning tasks, etc. And of course they all have an academic component.
And if you're lucky enough to have especially skilled teachers at your local school when your kids are there then you also get to see the results of all their hard work in performances of stunning quality.