Graham Gilding Davieswas a Welsh footballer who played in the Football League as a goalkeeper for Colchester United... (wikipedia)
There are units in grammar, and units in vocabulary and even online where's there's audio support and video support. A great deal of this is based on visual interaction and visual memorizing,
We've moved on through tape recorders to video, through to multimedia computers,
We'd definitely like to see snow, but life goes on. You've got to deal with what you've got.
Speech technology has moved on a lot in the last 20 years but the problem arises at the recognition level. Human beings have different speeds of delivery, they have different accents.
The main thing is that they offer opportunities for much more intensive practice on a one-to-one basis.