It is a wonder we learned anything at all and it made English tests a hellish experience, since it was never clear what was actually correct. This was on top of English itself being a confusing language (see all of the words ending in ough if you need an example). English teachers seemed to assume we had some magical ability to know the right answer after confusing us with conflicting examples, and we rarely did. It is no wonder back then that they said the same things about us.
If they want to improve literacy, they should replace the required reading with books that have no flaws in the spelling and grammar to reinforce English lessons. Then we might see student literacy rise as students stop being so confused.