Hi,My students really likes this one, and yes, many managed to get to the 40 wpm.
An american site, but with clear explanations.
Not for the youngest ss, but definately worthwhile a visit if only for ideas.
Both sites come without the annoying ads etcetera.
I have the luxury of a Interactive Whiteboard.
My students learned to use computers simply by watching me and of course by being interactice themselves. The do=as=i-do principle works very well for them (and me).
I don �t have �units � readily available, but this will get you started.
Cheers
Peter