OK, this example of a P3 is a bit unusual, but that's exactly what I want to highlight it. 

It describes several programs in Austin funded and managed by government, academia and private sector to help low-income residents prepare for better-paying jobs. We generally associate P3's with physical infrastructure, but I love this example because 'human infrastructure' is probably more important to our societal success. And this shows how we can all team up and work together to make it happen.