Now you can create a one-time (Adhoc) assignment from the calendar, assign it to an existing lesson plan, and have it show on the report.
From the calendar, click on create --> create assignment.
After you select the course, select the lesson plan name that this assignment will be assigned to.
Finish filling out the form & press the create button.
This assignment will now show on the report for the assigned lesson plan name.
These ad-hoc assignments will not be displayed on the lesson planner but will be displayed on the reports.
If you do not have an already-created lesson plan, you can create it by typing in the Course Name and then Lesson Name. (You will then see this plan on the Lesson Planner.)