England

England
Studying for your GCSEs is often known as Key Stage 4 and is the last two years you'll spend at secondary school - Years 10 and 11. In this time you'll be working towards a range of external qualifications which will be assessed through exams and coursework. The most common exams you'll take are GCSEs, but you might take these alongside vocational qualifications of NVQs and BTECs.
English, maths, science, ICT, PE, citizenship, sex education, careers education, religious education and work-related learning are all included in the national curriculum, so must be studied by all students between the ages of 14 and 16.
You now have to take at least eight subjects including the GCSEs of English; maths; three subjects from the sciences, computer science, geography, history and languages; and three further subjects, which can be another three from the previous list, or further GCSEs or vocational qualifications.
In Year 10, depending on how hard or easy you're finding your exams, you'll have to decide what you want to do after school. You've the opportunity to undertake an apprenticeship, go to College to studying for A-levels or more vocational qualifications, or start working alongside studying. Many of these options require you to gain specific grades at GCSE, so you'll need to think about how well you are going to do and what you think you can achieve, and what's required of you before applying. Most applications for college are done in the Autumn term of Year 11 and you'll have brief interviews for them in the Spring term.
Qualifications
Wales

Wales
Key Stage 4 refers to your last two years of secondary school - years 10 and 11 - when you'll be between the ages of 14-16. Throughout these two years you'll be working towards a range of external qualifications which will be assessed through exams and coursework. The most common exam you'll undertake will be GCSEs, but it is likely that you'll take these along with NVQs and BTECs.
Towards the end of Key Stage 4 you'll have to decide whether you want to continue your education through attending College or undertaking an apprenticeship. College, a job or an an apprenticeship will all require that you attain certain grades at Key Stage 4 so make sure you know what is required of you before you apply.
Northern Ireland

Northern Ireland
Key Stage 4 refers to your last two years of secondary school - years 10 and 11 - when you'll be between the ages of 14-16. Throughout these two years you'll be working towards a range of external qualifications which will be assessed through exams and coursework. The most common exam you'll undertake will be GCSEs, but it is likely that you'll take these along with NVQs and BTECs.
Towards the end of Key Stage 4 you'll have to decide whether you want to continue your education through attending College or undertaking an apprenticeship. College, a job or an an apprenticeship will all require that you attain certain grades at Key Stage 4 so make sure you know what is required of you before you apply.
Scotland

Scotland
To (hopefully) make things easier, Key Stage 4 is roughly equivalent to the first year of your senior phase (S4) when you are between the ages of 14-15. Throughout this year you'll be working towards a range of external qualifications which will be assessed through exams and coursework. The most common exam you'll undertake will be your Nationals (previously called Standard Grades), but it is likely that you'll take these along with SVQs and BTECs.
Towards the end of Key Stage 4 you'll have to decide whether you want to continue your education through attending College or undertaking an apprenticeship. College, a job or an an apprenticeship will all require that you attain certain grades at Key Stage 4 so make sure you know what is required of you before you apply.