Skip or Extend a Lesson

I would like to Skip or Extend A Lesson without having to delete the lesson from my unit.

Right now, the only way this could be done is by having the units written outside of the lesson planner. (Or creating a master planner that is not edited.) Then the units are whole and complete. When starting a new lesson planner for the year, we can import lessons and then just delete a lesson or copy a lesson if we want it to last 2 days.

Another thing that may work is by allowing a box within the lesson that says how many days the lesson is. It could default to 1 day, but could also be changed to 0 (to remove the lesson from that year's planner) or extend a lesson by changing it to 2+.