This is a great thing to do the last week of school! Students are required to plan a lesson (I've had everything from informative lessons on animals to multiplication to origami to drawing to shooting a basketball) and then teach a lesson. This file includes the planning sheet, along with a rubric to assess the students on their lesson. It is left vague on purpose, so you could assign a topic, or let the student decide for themselves.
Note: The learning goal is the same as a lesson objective. We go over it before each lesson I teach, so it is a natural part of our classroom :)