Does Adobe offer any FREE online courses? Or are there any other sources that offer Adobe courses that are truly FREE?

Hello,

I am new to Adobe, and I am trying to learn and teach my homeschooled high school student as much as possible about several Adobe Applications/Software. I did a Google search and came upon a link for a "Free 13 hour Photoshop course". When I try to access it, it shows that there is a new course for Adobe Photoshop CC. When I click that link, it says the course isn't ready. I have found many tutorials, but I am trying to find any actual courses for Photoshop, InDesign, Illustrator.. I would like to learn and teach pretty much all of the most used/popular Adobe applications. I just cannot find any actual courses that are truly free. I have seen many free trials, but I need something more in-depth. I need to be able to ask questions, and possibly even have quizzes, so I can know if I am actually doing things correctly.  I am completely new to all of this. Unfortunately, I cannot pay $900+ for these courses. If anyone knows of any courses for any of these applications that are free or almost free, I would greatly appreciate if you would share. Thank you!

~Kaila