This Battlefield 3 Guide well teach you how to level up your weapons and your classes. We will also go over the right classes to pick so you can level up effectively. There are a few ways to leveling up and of course there are some illegal ways which you shouldn't do. People have a bad concept thinking the more kills the faster you level up but this isn't the case in BF3. Battlefield 3 is more of an objective game and the more objects you do the more points you get.