What the alien races learn most from us is about human nature, how we think and feel and behave, how best to work with us and how best to approach us.
I don't know what specifically, if any, technologies or practices we have yet that they can learn from, but we humans are unique and that shows to them in our cultures and practices.
We humans are very young in our evolution.
We have strong, unique abilities we do not even know about yet, that other life marvels at.
The way that we think and feel is unique.
The way that we love is unique.
We are passionate and dynamic.
We fight for what we believe in, and we do not give up until we get what we want.
We have a lot to offer all life in the Universe, and we will when we take our place among our local group of worlds.