I'm hopefully going to start collage next year and major in physics and math. this year i have a lot of free time and i thought that it'd be good to study some of the material by myself to take off some of the pressure later - and also cause i'm really interested in it and can't wait a whole year. but i'm not sure what would be the most usefull subject to learn. I've already learned the Calculus basics (I,II,III) and want to go on to something else. what do you guys recommend? the most accessable subjects (there're good textbooks at a local library) are linear algebra, mechanics, electronics/magnitism and modern physics. were should i start? Thanks.