Grading Papers?

You know you're a homeschool mommy when you're taking your shower, and the bathroom door opens and a child yells "18 x 6 = 108??" "Yes, it is." Then, 20 or 30 seconds later, the bathroom door opens and the child yells "17 x 7 = 119??" "Yes, it is." And then, 20 or 30 seconds later, it happens again: "13 x 8 = 104??" "Yes, it is." And so forth.

Y'know, I hear tell that some teachers actually "grade papers" while sitting at a desk, dry and clothed, with an actual piece of paper in front of them, and a red pen in hand.

Well, I suppose my way saves time, if not privacy and solitude in the bathroom.