This module is used to configure the classroom environment for all Puppet Labs training courses. Unless you are an instructor, this is probably not the module you are looking for. It makes certain assumptions about the environment and is only flexible within the design specs of our training courses.
That being said, you're welcome to poke through it and see how we set things up.
Simply classify every node in the classroom with classroom::course::${name}.
It will manage all roles of all nodes in the classroom as appropriate for the course you are teaching. Please refer to the InstructorGuide.md for the appropriate class for more complete instructions.