write an argumentative essay on the topic:"Should cameras be placed in classrooms?" 

Such questions are meant to test your writing skills and should be attempted on your own. However, these points might help you elaborate:
- CCTV cameras are used to keep a track on the activities in a particular place.
- They are installed in classrooms to supervise the students and see that they are disciplined.
- They also track a teacher's activities and the way she teaches in class.
- The behaviour of both the teachers and the students can be monitored by the supervisor or Principal.
- They also help in keeping a check on the students to ensure they are safe.