Anything worth doing is worth half assing. If you don’t feel like doing the assignment, sit down and start doing the work, but badly. Don’t check your work or self edit, for reading just skim it. No matter how badly you do it, it’s still going to be better than none of it being done.
Often just starting is enough to get you engaged and do better work. And if it’s not, well, half assed is better than nothing.