Mrs. Geeta is teaching class VIII in a village school. She enters the class and instructs the children to take out their social studies textbook from their bags. She starts reading a lesson from the book. There is silence in the class. Some children are looking into their textbooks while some are peeping outside. She finishes the lesson by asking one or two questions. Only two children raise their hands. She asks one of them to reply and that’s all. This is an example of _____.