Someone I know is looking for a course teaching introductory calculus (univariate differential, integral) using the Wolfram Language / Mathematica. The course needs to be taught on an online basis from an accredited US college such that the credits received could be transferred back to his home university. To my surprise, my 10 minutes with a search engine did not find anything current. Is anyone aware of such an offering?
Netmath at the University of Illinois has several offerings.
The link below explains the connection between their mathable and Mathematica.
Dosclaimer: While I know some of the people currently or formerly involved, I am not familiar with this program in any details.
Have you tried the MIT open courseware? I do remember a colleague of mine from a long time ago enrolling for a Mathematica related program at the MIT open courseware. You can find more info here
Another option that comes to mind is Lynda.com
You can find some info here https://www.lynda.com/Mathematica-training-tutorials/2011-0.html
Hope that was helpful.