Livre d'Or

Most of my group work experiences are of the "arbitrary group selection, produce a final item, all persons collectively graded" variety, and they mostly were bad because of the lack of motivation among others and the differing desires about grading and the anxiety of having your marks determined by others.

There was one good exercise, as a part of the beginning coursework for library school - the school solicited community partners with information needs that could reasonably be handled by first year graduate students, and then offered them as projects with recommended group sizes for tackling, so that people who were interested in a thing could all join up. A deliverable was expected, but even if you couldn't get to it, the process of determining information needs and figuring out what would work best with those needs was the actual point. It's the best group work experience I've had, because it's essentially the only time something like actual work environments was put into play.

Actual group work in a workplace is much more about delegation and responsibility checking and having a group of people you trust to do the work around you.

(And, hopefully, you have a group and a manager who aren't actively trying to sabotage you, get you fired, or pass off as much work as possible to others. Because that will, y'know, essentially kill any sort of cooperative spirit you have for a very long time.)