Answer 1

(i) To avoid noise pollution in the classroom: 

• When the teacher is not present in the classroom, all students should observe silence and not shout loudly.
•  Activities such as book reading, solo singing or storytelling should be carried out so that the other students can maintain silence.
• The monitors in the class who control the classroom should ask the teacher to punish the students who make a lot of noise
•  Add curtains to the classroom.
•  Use cork bulletin boards for the walls.
•  Place sound-absorbent panels on the upper walls of the classroom.