I can't spell and you dd sounds just like I was at that age.
If she is like me, a dictionary isn't going to help her much, I can often fail to find the word I'm looking for....you have to be able to spell the word a little to find it!
I would have a word with the school, get her checked for dyslexia, possible get her put on the SEN regester at school action level (no big deal but will get her some structured help). Geting word lists can help.
The other thing is, can you ask the school not to correct every spelling mistake? If you are a bad speller and they correct everything, you just give up hope, and give up trying (from my experience).
Dyslexia /praxia wasn't recognised when I was in school. At least your dd has the advantage of good handwriting, mine is awful and my kids are both the same.
See if you can get her the help that she needs, don't put too much pressure on her, this happeh=ned to me and was very negative.
And in the end I got a good degree, from a good university, and teach in three of the best unis in the UK!
And I type all my lesson work, and spell check it!