I'm shocked at some of the vitriol on this thread towards the OP. Some people on Mumsnet are so narrow minded and absolutely obsessed with GCSEs, pushing their children to complete a huge handful through selective high pressure schooling and refusing to see this isn't the way forward for every child.
I'm a bit older, have watched lots of kids go through the education system, there are lots of ways to success and success isn't always a top degree and a high paying job. Your life depends on your mental health and school can be very detrimental for some children's mental health. There are other ways of learning, so many people have been conditioned to believe school is the only way.
My bf home educated her two girls, they are lovely happy, sociable young people in jobs they love. Both have degrees and were accepted for uni with a random collection of awards, experience and GCSEs (one only has 5, 1 A level, plus other awards and had a lot of work experience in her chosen field) . Bf says people forget you only need to be one step ahead of their learning to teach them. You can cover so much in a short time when you are only teaching one or two children, and not wrangling a class of 32.
My own child is 14 and her experience of school isn't great, it's destroying her mental health and we have already had one suicide attempt. Yes, she is doing the requisite 10 GCSEs, but gets so much homework that outside beneficial activities have fallen by the wayside. She isn't self motivated to learn, as education is just learning by rote these days. Not all schools are good places to be and not every parent has a choice of schools. And as for the social aspect, teenage girls can be vile, there is no time in your life when you will be forced to exist with only your age group. Most of us have friends of different ages, school is an unnatural environment socially. And to the person who mentioned travel opportunities, many of us can't afford school trips, but my DD will travel with Rangers instead anyway.
I wish I was able to home ed, but it would only work for us if I could use a device like Interhigh and we just can't afford it. And DD wants to persevere with school.