The A level course is a two-year course. The Advanced Subsidiary level (AS level) is the first year of this course This can be a qualification on its own. A2 is not a qualification on its own, it is the second year of the Advanced level (A level) course. AS+A2 = A level.

General Certificate of Secondary Education (GCSE) is a qualification taught primarily in England. The I stands for International. International General Certificate of Secondary Education (IGCSE) as the name suggests is primarily aimed at schools outwith England. However, there are some private schools in the UK that opt to teach the IGCSE instead of the GCSE qualification.

You will need to have basic knowledge of which syllabus you are going to be doing whether you are home study or at school. The courses section gives you access to the syllabuses for the courses on offer.

AL generally denotes A level and IAL denotes International A level. IAL tends to be taught in schools outwith the UK. There are some exceptions to the rule where some international schools choose to teach some AL rather than IAL courses.