Normal
Some of the online high school programs don't require students to turn in assignments until the end of the term. The idea behind that is to let students work and learn at their own pace, not to just blow off their homework. Online schools were designed for at-risk students, so they are given more leniency. If he doesn't get caught up on his assignments he will be expected to turn them in at the end. If he misses the deadline they will give him an extension. If he misses that, he has to retake the course and he will be a year or half a year behind. That means he graduates late. Ask him if he wants to still be in high school when he is 19-20.