I can quite see that having formerly seen you grandson's school reports you feel snubbed and hurt this year.
But I am honestly astonished than any grandparent would expect to see a grandchild's report.
Okay, my grandparents did not live within easy distance of us, but my parents made do with telling them that our reports were satisfactory, good, or that we were have difficulties in certain subjects.
Neither my parents nor my grandparents expected that something that is basically a confidential document should be handed round the family.
I remember my mother handing me my report to read when I was seven, and mentioning that many parents did not actually show their children these reports, but just told them what was in it.
She would never have shown me my sister's. or shown my sister my report, considering that a breach of confidentialty.
I was never present when my parents discussed my sister's report with her, or she in the room when they gave me the details of mine.
I cannot imagine any 13 year old wanting his grandmother to see his report - but I cannot speak from my own experience here, as all my grandparents were dead by the time I was thirteen.