There are many ways to set up the class to do partner work. "Lineups" is one technique that I have explained. One other technique that I often do is called "Rotations." Rotations works as follows:
Students line up in two lines, exactly like "lineups." When the students are ready say "rotate." The students all rotate one person along, but they do this in a clockwise fashion. Of course, the students will probably not understand the word 'clockwise,' but it is easy to explain.
I will post other ways to conduct discussions and conversational practise later.