I did A-Levels in 6th form (I was in the last year before it changed to AS and A Levels), then a degree in Sports Technology... If you're thinking of dropping out, I'd probably recommend having a look round to see what else available first - apprenticeship, job, etc. Free education, in my opinion, is one of the best things you can take - I know it's a cliche and it sounds cheesy but your school/college/uni years really are the best.