For those curious, Harvard put up one of its Digital Photography courses up on Alison:
https://alison.com/courses/Digital-PhotographyAlison is free learning, that if you pass the class you get a certification for it. These certs are viable for resume but I do not know how much traction you will get with them. I know people who have completed the ABC IT course and it helped them get a job, but its not as known as the CompTIAs.
However this is supposed to be a very good set of classes about how digital cameras work. Histograms are something I have always struggled with - I started in film and never really dove deeply into Photoshop until recently.