From group assignments, to planning a friend's surprise party, to almost any work you'll have to do at any job, cooperation and the ability to work in a team are skills you are going to need in your arsenal.
Unlike your friendship group, you don't always get to choose (or even know in advance) who you'll be working with. This brings us to the concept of 'teaming', the action of making teamwork on the fly, with whoever you have on hand. coordination and collaborating with people across all kinds of boundaries (experience, time zones, distance) to get things done.
To make teamwork takes work! Like any relationship, teams need care and attention and of course, communication.
It's also important to highlight the importance of diversity in building teams - of thought, ideas, experiences, skills and backgrounds - as well as inclusive cultures in which everyone feels empowered to contribute.