I need help with quantitative methods?

i had to take this class because its required for me in order to graduate with a business BA. Problem is im not that good in math and my teacher is straight off the bought,thick accent and very fast.atleast our test is take home,what should i do in order to have a study guide handy when im taking a test or if theres an easy way to help me understand this class.PLEASE HELP!i do read the book but its a bit too wordy,so i rely on the notes and even those are straight from the book.