history: I was ashamed once when I recieved a report card when I was young and I performed poorly. My parents trusted me to do well and I did not do well and slacked off.
current:  "I was ashamed once when I recieved a report card when I was young and I performed poorly. My parents trusted me to do well and I did not do well and slacked off.".
next: I think most people have been there.  Its tough disappointing your parents and even worse when you know you could have done something about it.