Conversation is the “art of exchange”. Students learn English but very seldom really learn the art of “holding a conversation” and making it a 2 way exchange. This technique helps this.
Any time students are performing an activity: dialogue, discussion, task etc… train them to “pass the pen”. After speaking, the student passes the pen to someone else. If you have the pen, you then must “add to” the activity. It’s your turn.
The simplist way to introduce this to students is to put some questions on the board or in a worksheet. Students randomly ask a question and “pass the pen”. That student replies and asks a question and “passes the pen”. You might even just use the “Spin the Question” game on EFL Classroom 2.0.Pass the Pen!,