Modified LecturesBecause various studies have shown that people listening to a lecture start to become distracted after about 10-15 minutes, modified lecture activities are designed to create a "break" in the lecture. This break should be some activity that creates a change in the pace of the class and ideally shifts the energy to the students. This activity does not need to be long and can be as short as 2-3 minutes.
The activity could be a discussion question, or could be as simple as giving students the opportunity to ask their neighbor for help in filling in something missing in their notes. The activity can also be something that helps the students to focus on the next topic to be discussed.
The lecture can resume right after the new activity is over. Students should be more alert at this time, and you should not begin to loose their attention for another 10-15 minutes.