There are many ways to approach creating a lesson. This is one possible way.
Preparation
Choose a subject of interest to students.
Find three or four suitable sources that deal with different aspects of the subject. These could be websites, reference books, audio or video of lectures or even real people.
During the lesson
Divide the class into small groups and assign each group a small research task and a source of information to use to help them fulfil the task.
Then once they have done their research they form new groups with students that used other information sources and share and compare their information.
There should then be some product as the end result of this sharing of information which could take the form of a group report or presentation of some kind.