Hi Dacia. Been wracking my weary brain on this one.
I need to know - is your presentation for adults or children? I hope you'll agree with me that the concept of teamwork is so well understood by anyone over the age of ten that lecturing to adults on the value/virtue of teamwork is condescending...and often irritating. Of course, you know your audience. If it is a group of adults, you should strive to be clever on this teamwork issue. A skit, perhaps, with a song in the background? Most sea shanties were sung to give a team of men a rhythym for working in unison, e.g., for hauling on ropes. There are many such shanties in our DT database, such as [Haul Away Joe].

Adult songs on this theme are more likely to stress the power of the group, i.e, collective bargaining. The database has many songs on unionization, if that's how you want to go. Search for Solidarity Forever, for example.

As for examples of teamwork for ladies, this is risky, and you may want to consider your selections very carefully. Modern feminist songs carry unashamedly a strong anti-male message, which may not go over well with a diverse audience. I cannot think of any teamwork song from the pre-liberation days. Give a try at Girls of Dublin City which is in the database, and report back here with your additional thoughts.

--SteveF