~ Preparation
To do the task we set students while they listen there could be specific vocabulary or expressions that students will need. It's vital that we cover this before they start to listen as we want the challenge within the lesson to be act of listening not of understanding what they have to do.
While listening
When we listen to something in our everyday lives we do so for a reason. Students too need a reason to listen that will focus their attention. For our students to really develop their listening skills they will need to listen a number of times-three or four usually works quite well-as I've found that the first time many students listen to a text they are nervous and have to tune in to accents and the speed at which the people are speaking.
Ideally the listening tasks we design for them should guide them through the text and should be graded so that the first listening task they do is quite easy and helps them to get a general understanding of the text. Sometimes a single question at this stage will be enough, not putting the students under too much pressure.
The second task for the second time students listen should demand a greater and more detailed understanding of the text. Make sure though that the task doesn't demand too much of a response. Writing long responses as they listen can be very demanding and is a separate skill in itself, so keep the tasks to single words, ticking or some sort of graphical response.
The third listening task could just be a matter of checking their own answers from the second task or could lead students towards some more subtle interpretations of the text.