How does a teacher keep time in class?

Teachers usually follow a timetable during lessons, organizing each session according to the content and lesson plan. During the lesson, the teacher will keep an eye on the time, keep track of the progress, and make sure that each session is completed within the allotted time. If there is not enough time, the teacher may compress the time for certain sessions appropriately or give additional explanations in the next lesson. If there is enough time, the teacher will also add some interactive sessions appropriately so that students can better participate in the class. In short, teachers need to be flexible with the time spent in class to ensure a balance between the pace of the lesson and the effectiveness of the teaching.