I Feel She Isn't Her Age .. Because She is Little old , Child learn 3 year after.. then its get knowledge, Remembers anything in memory .so please she is little child doesn't pressed on her .....
                                                                       We hope that She learn everything ,do everything in her life ... get success      
                                                                              Thank You

My daughter is having similar problems. We are looking into testing her for ADD and dyslexia. I wish I had an answer for you!

Be patient, save important homework when it's returned to you and review it with her. Have her tested to rule out any disorders or learning disabilities, and ask her current and past teachers what they think of her skills in class and behavior. How is she at home remembering things? Make sure she is doing homework in a quiet place, no tv, no radio, minimal noise so she can focus on her work.

First of all, my daughter has struggled with the ADD for quite some time now and I finally wrote a letter to the Principal in 4th grade, eventhough I kept telling the teachers that she has ADD since I have it and my dad has it, which can be hereditary.  

Your first step is to write a letter to the Principal and request that your daughter be tested for ADD.  They will test her with the School Psychologist and the standardized tests for that problem.  They have to test her when you have it in writing.  If you just talk, nothing will get done.  I actually moved to a different town because of a better school system... but they have to test no matter what.  

also, nutrition has a key role in this too that helps tremendously.  I give my daughter flax oil supplements, gummy vitamins, fruit/veggie bears, L-theanine, an amino acid works wonders.

Hope this helps..