Upon posting students' grades for the first time:
Me: "OK, class. If you haven't noticed, I've posted your grades on the back wall. Please, check your grade and let me know if there is a problem."
Student calmly and silently raises his hand
Me: "What's up?"
Student: "Umm...Mr. K...I have a problem. My grade has three numbers in it...A '1' and two '0's'."