If we are going to loose 80% of current jobs by the year 2027, then Khan Academy is poised to turn education upside down by offering courses for adults to retrain for the new creative jobs.  There are many of us who are taking agency of our learning and wanting to be prepared for when our jobs are done away with.  (See the University of Phoenix video https://youtu.be/2TTd2FmYr0g ).  The ongoing problem for most of us is the cost. Khan Academy already has the model to make education accessible to everyone!

The next logical step to incorporate the retraining of currently employed adults would be to figure intermediate careers and find instructors to host the videos and write the curriculum.

You would be on a two pronged attack to turning the education system upside down.  Please consider the adult retraining niche as your next set of projects.  You could consider promoting a voluntary pay it forward system with the adult alumni.  

I am with you in this endeavor. I write "KhanAcademy.org" on my personal business cards and hand them to parents of struggling students.  Once I secure new employment I am going to send you money each month to fund new topics.  

Thank you Sal and staff for seizing the opportunity to make a difference in our society.  I am sure that the future will speak kindly of you.