So it sounds like I don't have to focus on reading so much as vocabulary level. How can I get an idea of what a fourth grade vocabulary is?
It's kind of entirely dependent - some fourth graders, especially big readers, and/or those with educated parents who themselves have large, varied vocabularies, will have large, varied vocabularies.
Some, especially the opposite of the above demographics, will have much more limited ones.
I've known fourth graders completely capable of reading and comprehending most articles in the NYT, and those who would have trouble doing both or either.
Also, you said her vocabulary has grown as she's interacted with people, read whatever, etc., so I don't know how limited it'd be in that case regardless.
These are words from a random school's fourth grade vocabulary list that I found online.
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cubicle
bail
reinforce
expel
abandon
impetuous
dilemma
[/FONT][FONT=trebuchet ms, arial, helvetica]
resolutely[/FONT]
[FONT=trebuchet ms, arial, helvetica]
scoff
assail
optimistic
lament
steadfast
decisive
gratifying[/FONT]
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resigned[/FONT]
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lurch
primp
putrid
rowdy
jovial
outlandish
allure[/FONT]
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suave[/FONT]
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[FONT=trebuchet ms, arial, helvetica]These are apparently on a national reading vocabulary list (google that and it comes up more than one place), as being among the nearly 1000 words that should be mastered by the end of fourth grade. It says they're the next most common after the 2000+ in the first three grades' curricula -
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[FONT=trebuchet ms, arial, helvetica]citizen Germany rust velvet abnormal plantation
knight cancel challenge shin transaction aviation
doubt balance knowledge width taxation vigilante
knob accelerate legislature sniff malfunction
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So clearly depends on the school as well. The national list would appear to be the baseline - better schools obviously go beyond the basic requirements.