Would it help if the tests were written in ebonics?
An argument is when two people
a. agree
b. work together
c. feel differently
d. quarrel
You probably see the problem. The kids now know what an argument is, but the people who made the test apparently believe that they've heard the word "quarrel" before. But they haven't. It's nowhere in the prepared text.
When teachers complain about this kind of set-up, we are told to look at the test in advance and "frontload" the kids so they know that quarrel is another word for argument. But these high-stakes test, we don't get to see in advance. So we really get screwed sometimes. They tell us what they want to test the kids on but they make the questions so bizarre...
Now, if they don't know "because," are they going to know primary, export, economy, agricultural, deposits, and located? No, of course not. Again, teachers are told "Well, look at the test in advance and teach them all those words too. And also teach them how countries trade and create wealth."
Again, this is already making it unnecessarily difficult for teacher and student alike. Now imagine those tests being tossed at your kids and you CAN'T see them in advance and be ready to let them know that, while you have taught them what a metaphor is, you now must quickly teach them what is a windmill and a saber, because that's going to be the example the test will use.