I also think that teamwork is better.
Oysha, you said that teamwork is not so great, because it doesn't allow teachers to grade according to each one's knowledge and participation in group work activities. And you said it may lead to some disagreements of students who were active in preparation. That's why this article is suggesting to make students work in groups with individual accountability, which means every student in the group is important and responsible for the grades In this case active students let other passive groupmates think As a result, active and passive students work with no exception and no one is disappointed.