I don't have kids but something about this resonates with me and I wanted to share. Too often people will label a child lazy (or another name) without actually considering what may be going on in the child's head.
When I was your daughter's age, I was a sensitive child and rather shy. I could do a lot of the work at school, BUT, if I missed a point about something, or didn't understand an instruction or a bit of a process then I could and did easily end up in a similar situation to your DD.
The way I'd end up in that situation is this: I'd miss the bit of information or not understand something. I'd then have to do some work/a task but I would be unsure of how to do it. I was scared to put my hand up and ask a) in case I got into trouble for not understanding the first time and b) in case the other kids laughed at me because I didn't understand it. I'd then sit there getting paralysed in my own head! Then as time went on I'd be MORE scared to ask for help in case of a) and b) above and now also c) because I've taken so long to ask for help, everyone is already miles ahead and I'll get into more trouble for waiting.
Do you see? To you and me as adults it's simple - you need something explained, need help with something, or need clarification on something, so you ask. But to a child, particularly one who is a little bit sensitive and/or shy, something that simple can quickly become something huge to where they're simply overwhelmed with the situation.
I'd suggest that she needs encouragement so she knows it's okay to ask for help and she will NEVER be shouted at or made to feel silly for asking questions. It's paralysing to feel you can't ask for help at school. Chances are once she overcomes her nervousness and anxiety about certain things, she'll fly!
And if it's any reassurance - I now have a very successful career, it was never a real learning problem, just anxiety that would build because I was scared to ask for help when I needed it.
I just wanted to share because sometimes it's hard to understand from the child's perspective... but I WAS that child.