There were none of these when I was in high school only a few years ago, and they still aren't a thing from the high schoolers I know. The system is still the

There were none of these when I was in high school only a few years ago, and they still aren't a thing from the high schoolers I know. The system is still the same - every day you miss the assignment is one fewer grade, except for some, where you automatically get zero. You cannot retake an exam without cause. It's just selection bias.