I also have a 4th grader who forgets things. Every day when I pick him up from afterschool, I have to check his bookbag to be sure he's packed his homework assignment(s), coat, etc because he's always forgetting something. He often forgets to turn in his homework and when he takes tests, the teacher has him to sit at her desk to keep him on task. He’s easily distracted and nothing keeps his attention long unless it’s a video game. He’s a smart kid and makes good grades most of the time, but only because his teacher and I stay on top of him so much. I’m wondering will he ever get himself together and become independent and organized. And could it be that playing too many video games is part of the problem?

True for my fifth grader, too. Does some expert have an answer?

The description of your daughter's behaviors are similar to those frequently seen in children with attention deficits, including the poor handwriting. Many people don't realize there are currently 3 different subtypes of ADHD, and the "inattentive" variety is NOT usually accompanied by any hyperactivity, but often DOES include the lack of focus and difficulty doing/turning in schoolwork that you describe.
ADHD is considered a medical condition, and schools can't diagnose medical conditions. I recommend that you discuss the situation with your daughter's pediatrician (although they may be more familiar with the kids who have the hyperactive types of ADHD, in which case I encourage you to ask the doctor for a referral to a specialist) and also please join us in the Greatschools Learning and Attention Difficulties Group at community.greatschools.net/groups/11554

Thanks Michellea. That is also another area of our concern. Her penmanship is worse than when she was in 1st grade. When I found papers in her backpack and asked her when it's due, she just told me she doesn't know. It feels like she is falling apart in school. These lead us to wonder if she has any medical issue that we were not aware.

Thank you for the reminder. My daughter told me her teacher has a basket, kids leave the quiz in the basket when they completed. She is in a class of 35 kids, the teacher does not has any assistant. So the kids need to be very discipline. However, I will suggest the teacher to collect the work directly from my daughter.

There's got to be a bit more to this - was it the teacher who told you your daughter's test/quiz were missing? How many are missing and why hasn't the teacher called before??
I'd ask the teacher then if you haven't yet - what happens at the end of a test/quiz? Do the children pass their papers to the front of the row? Or does the teacher collect them individually?
If the children are passing them forward, then it's possible your daughter passed the other tests forward but not hers - perhaps she absent mindedly set it down on her desk or in her desk. But they be should be somewhere...
Given that this happened, in the future, the teacher should take her test(s) directly from her so it doesn't happen again.
How many children are in your daughter's classroom? If it's very large, then the teacher's disorganization is more understandable but many tests and quizzes shouldn't have to go missing before a teacher calls home and lets you know that they are.

I would check in with the teacher as Healthy advises. Typically, forgetfullness shows itself in other areas - forgettting to bring home homework, not turning in HW, forgetting to write name, forgetting the steps to a classroom routine. I'm wondering if there is something else going on?

Does she have trouble in areas I mentioned? How does she do in school? Following directions? Handwriting? I hope you and her teacher can figure out what is going and give her the help you need. If she is covering up something, it's important she gets the help needed so she can be more successful.

Has your daughter had prior difficulties remembering things in K-3rd grade? In most schools, from K-3, they're teaching kids to learn to read, but after that, the kids are expected to be able to read to learn. I'm wondering if your daughter has issues where she isn't getting her work done, either because she doesn't understand what's expected, or she knows what has to be done, but is struggling to put it down on paper, and so she's embarassed to ask for help, or embarassed to turn it in, or embarassed to show you what grades she's getting. Have you asked her teacher about the situation?