Question

every year 50 class room desks are damaged how could this problem be tacled

Answer 1

in india there are many students who sit in bare floor for studies. those students know the value of benches and desks.
    In my opinion these kind of benches and desks are mostly made up of natural resources. these kind of natural resources are endangered. so we should give awareness to those who are damaging natural resources.

Answer 2

This problem can only solved by giving sever punishment to the students who try to damage the desk and imposing a fine to the whole class for any damage of the desks. Make a class representative for looking after the desk. And take classes in the school about the important of the desk and the benches.  So the damage will reduce to a limit.