Also from the article: > Of those 21 states, three said every essay is also graded by a human. But in the remaining 18 states, only a small percentage of stude

Also from the article: > Of those 21 states, three said every essay is also graded by a human. But in the remaining 18 states, only a small percentage of students’ essays—it varies between 5 to 20 percent—will be randomly selected for a human grader to double check the machine’s work. So that applies only in a minority of cases.