Shiok right? 
In these 2 weeks, if you manage to understand some concepts and
practise regularly, it will help greatly.
If you really want to improve your A Maths results, go for one to
one tuition. Although I hate tuitions, this is the only subject I
say you can go for tuitions. Get someone who really knows his/her
stuffs to tutor you, drill you, and explain to you. Also, ask when
you don't understand. After lessons end, take a break and practise
some questions.
I had improvements, but due to laziness, it cost me my marks.
