do well in high school

i would like to get some advice on how to buckle down and get good grades i just dont concentrate that much. i would like some advice please help

i am going into high school and i hope that i can find all my classes and do well in all of my classes!!=)

11th grade.
doing HORRIBLE in all classes. especially calc, probably have a D. i need to do better.
my gpa is a 3.3…thats horrible. how am i gonna get into college? especially colleges like University of California.

I am such a spoiled brat!! Seriously! I go to a british ciriculm school, so ive got a LOAD of free time, and im pretty good at my subjects, but im just so LAZY!!!But even when I do try, how do I juggle it with studying for the SAT (which I ALSO suck at), dieting, and working out? Not that hard-sounding, is it? I really am spoiled! Someone help, if you can D’= PLEASE

A’s and B’s all through HS, still almost a straight-A student in college. I always do well in school.

well, its half way through the year and I am doing fin, though no where near as good as I want to. The kids at my school are just to shallow, preppy and materialistic for me and my socila lif eis totally screwed. This makes me have a harder time with my school work and am getting really lazy. This trimester i actually got two c’s when I am normally a Straight A student. I really need to get working on this goal