Being a substitute teacher in high school during my studies made me realise that there is so much I want to teach these students, that has nothing to do with that exact algebra formula or science project, but the reasons behind why they learn all this. What paths it could lead them to in the future. And I think your idea is great in the sense that it can lead them to a different way of thinking, realising at an earlier stage what they want to do in the future. I remember we had a project in school called "My future". I wanted to become a Nutritionist, with specific focus on athletes. I was 15 at the time, and I soon realised that whatever expected of me for being admitted to this study, was far from what I was able to do (Top grades in maths and chemistry). I ended up doing a bachelor in International Marketing, and I know that this is the perfect way to go for me. If I knew this in High school, I would never have chosen to struggle through those (for me) very hard subjects. It is a lack of knowledge among young people today. Still, most of my friends and family keeps asking me what I can do with my undergrad in marketing followed by an MBA. To be honest, I still don't know, but I'm sure i will find out someday. And when I get that job, I would gladly go back to my old school and talk to them about their future, and what opportunities they can get from choosing the path that requires the skills they are good at.
I believe that some of the people willing to do this form of commitment, have close relationships to the respective schools. I am sure that, by reaching out to previous students, who now are positioned in different jobs in different industries, would be willing to "give something back" to their old school. Surely I would.
Could each school create some form of community for previous students, that reaches certain criteria? That the schools create a "pool" of experience, in which they have close relationships too, that would be willing to guide these students into different career paths and design thinking. It would make more sense for the student, why they learn the things they do in school.