This is pretty basic.
It is done in three rounds. In the first round the students first decide what homework they want help with. Then make pairs, do the dialogue and record the names and the subject.
Round two they decide where they want to go and do the same thing as before. I generally give instructions such as they must make new pairs or boys and girls must interact.
Round three they decide what they want to borrow.
The worksheet is a slightly modified worksheet another ALT made.