Cbse Affiliated School — showing exam papers

The written papers of half yearly exam will be shown only on open day. If a parent couldn't attend the open day the school is not showing the answer sheet to them. Itz not fair.

Every student/parent have the right to see the answer sheet atleast once. The children can understand where they go wrong and can correct it.
Correction from own mistakes makes betterment.

Kindly sort out a solution for this. All parents are facing such issues.