I am starting to do my Leaving Cert course in Ireland I have been recomended to do Maths,Physics, and Geography as my main subjects. As Physics and Maths have got a big involvment in all aspects of the training. And Geography is useful because you learn about the Weather and differnt topics like that.
But thats just my choice im follwing the advice told to me by other pilots. Science subjects arent essiential but very useful and helpful.