Bring out the creative side of your audience / class by having them create metaphors about the topic you are introducing. We often would like our group or class to think dfferently about and idea, problem, or exercise and sometimes creating a metaphor can help trigger insights.
In this activity the participants/students, working in pairs, discuss metaphors provided by you and relate them to their work situation, organization, or assigment. In addition, each pair creates one or two metaphors to add to the list. Each pair is given an opportunity to explain one of their metaphors to the full group. You could use this as an opener for a workshop, or class, to start people thinking about a topic in new ways - from a varitey of perspectives.
Of course the metaphors will focus on the topic of the workshop or class session and is a very adaptable exercise. Below are some examples that could be used with a group of teachers: