I’m learning to be a teacher, and I’m preparing a document which is a course for school students.
I get evaluated by more experienced teachers on my work and my pedagogic skills. My course must give them extra information that

1. my students shall not see
2. my teachers can conveniently read, together with the course, to get more information about why/how I organise the course in a certain way

At first, I considered writing double-page PDF: All rectos containing student course, all versos with pedagogic and extra comments.
This way, if I print only pair pages and I get the students-version of my course! Printing all pages recto-verso will give a richer view, on each « verso » page, about the content on the next recto.

Doing this manually is very cumbersome though: I need to finish courses pages manually (clearpage), then include pedagogic notes, then clearpage again to continue the course. If I must add extra content that goes beyond 1 page, all my pages logic has to be re-thought.

Would you be so kind to recommend methods where I can concentrate on writing my course, just including my extra pedagogic notes, and be able to « hide » them from my students while a more « full » version is available for my teachers?
Is manual page breaks the only option? Envisage some footnotes formats that can be put « aside » and enabled/disabled?

Many thanks!