Ira Shor's book When Students Have Power is a study of a course he taught at Staten Island College, CUNY.
One technique Shor recommends is "backloading." As I understand it, the idea is simple: if you have commentary or even a lecture you want to deliver, put it at the end. Start with participatory learning activity, help participants get their own ideas and questions on the table, build the dialogue starting with the participants, then see what issues arise and, if it still fits, add your piece to the discussion. Simple, but a very useful principle. Antidote to the standard "Lecture, followed by Question and Answer" format that still prevails.
As for adding your piece, best to look at Alforja for ideas of alternative ways to present information and ideas. (See the activity Cambio de Lenguage for inspiration.