Within any organization there is a top group and a bottom group. Great organizations are fortunate in that their bottom group is still relatively high but there will always be a top group and a bottom group.
Since this is the case, the question is, does the top group pull the bottom group up OR does the bottom group drag the top group down?
If we are talking about a classroom setting and the bottom group is forcing the teacher to slow down so they can understand, then the top group is being brought back toward the bottom (or at the very least back toward the average).
The successful organizations are the ones where the top group pulls the others up as opposed to letting the others drag them down.
Have a great day!