I am an adminstrator in a district with an online gradebook. Teachers are required to put in all tests in 48 hours, projects in 72 and any other assignments within one week of the due date. I would ream one of my teachers (privately of course!)if they pulled a stunt like that. In fact, one of our major complaints is that parents are often online checking so often that they'll be on while a teacher is entering grades and email to complain that their student hasn't received a score yet- sometimes within 2 min of the assignment being entered.