Parents spend a good portion of their lives trying (and often failing) to not curse in front of their kids. If that has been a struggle for you, then this homework assignment will really annoy you, because it's basically willing your child to spell out an expletive.
The writing sheet, dubbed a "pretty risky assignment for first-graders" on Reddit, asks that the kids find and spell 13 (thirteen!) words that end in "-uck".
Sorry, teacher, but at first glance, there's only one that comes to mind. How this kid managed to come up with "muck" and "buck" and "pluck," without slipping and writing what we're all thinking is pretty much grounds for an instant A+.