Copy a unit including its lessons.

I teach music to multiple classes of the same age group. I want to copy a unit from one class and paste it into another, and have all of the lessons included in that unit copy as well. This would tie in with the ability to print a unit including its lessons. It's strange that the unit seems to exist completely disconnected from the lessons within it. Could the lessons show up as cards in the unit?

Also: When I attempt to DIY this suggestion and copy cards from lessons to units, only the title of the card shows up, not the text.
This is extra useless for me because my card titles are all the time of the class since there is still no option for class times.