Usually, when a teacher is doing teaching work inside the classroom, he has to write or count important points and mathematical examples. When the teacher writes on the board with chalk, the particles of chalk fly and are inhaled by the teacher as well as those sitting on the front bench. It also goes into the breath of the students and also falls into their heads. My father is a maths teacher. He tells several examples daily to the students. Also, this happens when my maths teacher also tells examples. What I have noticed is that when I sit on the fourth bench in the class, I have clearly seen the particles of the chalk flying and falling on the heads of the students of the front bench. Due to this problem the health of teachers and students is also seriously damaged.