Team work can be a challenging concept for preschoolers. They want to be independent. They want to do things their way. They don't want to share.
We actively work on being a team in class. We clean up as a group and talk about how we are being a team and working together. If someone spills something, I will ask other kids to help them pick it up to encourage caring for each other. If one of the kids is having a hard time with something, I might ask one of the other kids to help them when it's appropriate.
At the beginning of the year, I like to do a lesson about working together. In the past we have made a picture together or talked about how we all have things we are good at. Each year we use the book, The Crayon Box That Talked because it is great book about working together.
This year, we did some activities together as a group. The kids did a giant puzzle together.
Then we went outside and did some parachute games where the kids worked together to make the parachute move in certain ways or make the balls bounce in certain ways. We talked about the importance of listening and doing things as a group.