The advice for this is much the same as that given by Mr. Cooklin for your IGCSE choices below:
As there are choices to be made, it is important that both parents and students are well-informed. In addition to the information provided by the school, you should also research the requirements of particular careers and universities for your future. If you are unsure about what you want to do in the future, then keep your options as broad as possible. Think about what you enjoy and what subjects you are best at and choose those first. Ask your subject teachers, House Tutor or Key Stage Co- ordinator for advice: this applies to parents too. Please do not hesitate to contact the school for any queries you might have.
Make sure you understand about the assessment and exam requirements of each subject too. When you read the subject overviews, you will see that different forms of assessment are used : written, oral, coursework and practical assessments.
To this advice is the added element of Higher Level (HL) or Standard Level (SL); this doesn’t always equate to a degree of difficulty, but is a distinction that is often made in terms of prerequisite subject demands for university entry (most commonly in the UK). This requires some research on your part and we have provided links in Firefly/Secondary/Higher Education to help you do this.
Nevertheless, the two criteria of aptitude and interest should take priority as they did in your IGCSE choices and you should remember that Years 12 and 13 are not just a ‘means to an end’ but are two years of your life in which you should enjoy your studies and experience success.