I had seen an Institute imparting this skill.
The teacher and about 5 students meet daily at a fixed time.
Teacher brings up a clipping of some interesting news from todays' English newspaper.
All students read this clipping.
And then one by one they discuss news item in their own words.
If there are mistakes, teacher guides them.
Here, sole theme is to improve "Expressions in English".
I think such methods can help in improving expressions.
Haresh Raichura 1/12/16