having a grade show up for kids in google classroom

What is the best way to remove an assignment xy on xy date? Alternatively, How do I prevent the unwanted assignment from affecting point averages? I'm using paid version Installed Version: 1.89 Thanks, Gerard

Can you delete a column with the unwanted assignment and not mess up the formulas used to generate the grades?

Is there away to import just the assignments under a certain category? For example, I have a gradebook for English so when I import the assignments from google classroom it on brings over just the assignments I have listed as English not every assignment I have created in my classroom.