This article is proposing that the students watch video lectures (prepared by the teacher or elsewhere) at home and come to school to work. This would keep students more actively engaged during class. This method would also provide more one-on-one time with the teacher as opposed to using all of the class time listening to the teacher.
This article contrasts question types that foster conversations with those that kill conversation. Although these tips are directed toward facilitating successful online discussion, they can be applied equally to in-person dicussions in class. Take a look!