text: Finally, missing a day in school can be extremely devastating to a student's grade. Adolescents who take a rigorous course load can fall behind as much as a whole unit, which can be taught in one day in advanced courses. The availability of classes online allows a student to review what they missed on the day they were supposed to be at school. Sick days are also roadblocks for students and the online course provides them something to look at while they relax at home. Once a student recovers from their sickness, they will have a general understanding of what they would have learned the day they missed.