Read the following passage and answer the item that follows. Your answer to this item should be based on the passage only.

At several leading universities, students now watch lecture recordings at home and use class time for problem-solving and discussion instead. Faculty who have run this 'flipped' model for a few years report deeper engagement during class, though they caution it demands more self-discipline from students, who must arrive having already done the assigned viewing.

Which one of the following statements best reflects the central idea of the passage given above?