Originally Posted by Freebase Dali

You never can tell. Out of all the group school assignments I've had, group projects for work, being part of particular teams in the military, it's never the same between each scenario. There's always a different dynamic... you just have to figure out how you're going work with it.
Like Engine says, do your part, but also be flexible. If the group comes off as a bunch of flailing chickens with their heads cut off and no sense of direction, they might be the kind of people that need someone to take charge and assign tasks and methods. Alternatively, there might be a group with too many chiefs, as the saying goes. (that's usually the most difficult to manage, and can lead to a lot of resentment and uncooperative people).

Ultimately, you'll do fine in school. Hopefully your grade won't be representative of the output of the whole, but if it is, that's a situation where you'll want to make sure the group is organized and getting the job done, even if it means the smartest guy has extra work-load due to fixing everyone else's mistakes. If that's the case, and you're that guy, well at least you know they'll go along with what you say, as their grade depends on it too. Then you can take the reins and make sure the boat doesn't sink with everyone on it.