I give my class this project 1-2 times a year depending on my group. I made it for a math class, but can be edited for any type of class where you would like students to teach mini-lessons.
I split my class up into 6 groups and give them a topic that they need to learn/relearn, typically it is something they have seen in past years and they need to apply it at a little higher level of application.
This handout includes directions for the class, grading rubric, and class teaching planning time and presentation calendar.
This activity will take about 5 day, possibly 6, to complete in class and the kids should be able to cover 6 smaller concepts.
They enjoy it and it is fun to see them get up and teach the class!!