I think you probably know this, but just in case anyone else is curious, the A-level (A = Advanced) exams are the ones that we take at the age of 18. We used to take O-Levels (O = Ordinary) and CSEs (Certificate of Secondary Education) at 16, but these have been replaced with one single exam type - GCSE (General Certificate of Secondary Education). However, A-Levels still exist and most people in the UK take either 3 or 4 subjects. Entry into university is based on the results of those exams (and in most cases an interview as well). We always list the results with the best ones first, and rarely bother saying what the subjects were.
Student or Learner