www.sense-lang.org is a very good free on-line typing tutor. It has a decent set of standalone typing tutorials. It also has a classroom learning mode for teachers to set up and use it with their students in a controlled mode. It also has lessons for seniors.

The site is very powerful in terms of typing tutorials but a bit awkwardly designed in terms of web aesthetics. Nevertheless it is very useful and free.

You can find it at:

online free touch typing program | keyboarding tutor | Free Typing Games.