Special education is only as good as whoever is teaching it. Sometimes it's great and other times it's utter trash.
There is (or was) a foolproof method to earn at least a low A on any exam or quiz.
Make cards containing all possible information presented to you in any form in class, in a book, or in any other form on a subject. They have to provide you with something in writing, or at least a link to the video or whatever, if you ask.
Answer is on one side, definition is on the other.
Ex) Side one: Atom; Side two: basic building block of matter, composed of protons, neutrons, and electrons
Go through the stack of cards after you have just learned the lesson, again at some point, and a third time before you are expected to know it. Make a "know it" pile and a "don't know it" pile. Keep doing it until all cards are in the "know it" pile.
This method once worked in one night for a classmate of mine who previously earned straight Ds.