[krumpet]

Agreed! And a skilled teacher would start by teaching Smoke on the Water with dyads (two-note chords) and then use that as a starting point for two discussions. First, one about barre chords and second, one about the same chords in their open format.

If the student is into classic rock, it's easy to expand this lesson into Cat Scratch Fever, Rock You Like a Hurricane, and Iron Man which are all similar to Smoke on the Water.