I'm chasing down free Linux tutorials. (I found I'd completed 50% of
one of my worker-retraining projects in 18% of the required hours in
the course. I added my Linux tutorial search to my course projects.)

According to

degreedirectory.org/.../Linux_OpenCourseWare_Educational_Site_Rankin\
gs.html

The lessons at

learnlinux.tsf.org.za/.../web-fundamentals.html

are a project of

http://www.shuttleworthfoundation.org/

Those are three of over seven million hits showing up under search
strings like

free Linux learning

free Linux tutorials

free Linux education

Looks like Steve Ballmer is trying to get his Elevate America project
on the train long after it departed the station.