Actually, I recommend this to high school students and community
college students who have an interest as well. And to FBO
owners who are not otherwise instructors. I think it helps them
understanding the process of teaching and learning, even if they don't
act as instructors themselves.

I think it's also an excellent way to practice for the actual
written tests for the private or commercial license, since the questions
are so similar.

Take the Fundamentals of Instructing (FOI) and the Advanced Ground
Instructor (AGI) written tests. Then take them to the
Flight Standards District Office (FSDO) and get a ground
instructor license. This may help you understand the basics
of flight instructing and help you with some self-awareness
as a student (and what you want from your instructors).