Stephanie Banchero & Stephanie Simon:

It was nearing lunchtime on a recent Thursday, and ninth-grader Noah Schnacky of Windermere, Fla., really did not want to go to algebra. So he didn’t.
Tipping back his chair, he studied a computer screen listing the lessons he was supposed to complete that week for his public high school–a high school conducted entirely online. Noah clicked on his global-studies course. A lengthy article on resource shortages popped up. He gave it a quick scan and clicked ahead to the quiz, flipping between the article and multiple-choice questions until he got restless and wandered into the kitchen for a snack.
Noah would finish the quiz later, within the three-hour time frame that he sets aside each day for school. He also listened to most of an online lecture given by his English teacher; he could hear but not see her as she explained the concept of a protagonist to 126 ninth graders logged in from across the state. He never got to the algebra.