unfortunatly that is bullying.
i got a lot of bullying through high school, at times it was worse than others but i just thought that i was better than them, coz i was.. and it proves it now because i'm in a place where i'm applying to uni, they're not even in college!
often they'll bully you because they're jealous of you being smart? that usually is the case, there are hardly any people that bully you for the fun of it, thats just a pretty ladish thing to do.
as for 6th form, trust me you'll love it. if they're that bad they may not even get in, but even if they do, they and you'll be wrapped up in your own worlds hopefully it'll never get to thebullying stage again.
i remember the girl who hated me and tried slating everything i did apologised to me in year 11, it was a bit like ;O wow, but yeah.. i moved on to a different school and alls been good since.
dont get put down by it! speak to teachers, i gave up being scared of what the bullies would do to me, i was like.. feck it i'm trying my best in school and i don't want people to affect me. teachers do help & you get preference by them ;P which is also good.