Public meetings work well when you want the class to consider the views of a variety of stakeholders on an issue. Examples of issues might be whether a dam or a leisure centre should be built in geography. The class should be divided into groups and allotted a stakeholder to represent (e.g. on the dam building issue you could have the farmers, the energy company, the government, the wildlife NGO, the factory owner). The group needs to think from their perspective and prepare a presentation for the meeting. A representative from each group then presents (from a podium if you have one) and takes questions. Finally a vote is held.