After becoming a teacher it became pretty clear that no one outside of education can understand just how brutal and time-consuming it is to be a teacher — especially when it comes to grading essays. But on the flip-side most teachers don't know how or where technology can help them. Or worse, they're surrounded by all this awful technology that's been forced upon them. My district's attendance system required three separate logins! Three! Argghh! Last year I had four sections of the same Senior English prep. That meant 96 papers would come in all at once. I was super-passionate about getting these regular-level students ready for the rigors of college so I would find myself spending 15, 20, 30 minutes per paper. That multiplied by 96 is insane. That's where came from — as a teacher I felt the same pain you're feeling but my programming background allowed me to see where a little bit of technology could go a long way.
There is quite a lot of work in each GCSE so it's always advisable to plan for that and make sure you can cope with the workload. In the vast majority ofschools GCSE Maths, English Language and Science are compulsory and the other subjects you will be entered for will be options that you choose from a range offered by the school (in some establishments a language is also compulsory and in others, Religious Studies too). All in all it's worth taking a lot of time in Yr 9 identifying those which you have to take, and then finding out as much as you can about the others before choosing your options.