Thanks again for all you replies. What I am trying to say is that I am just now applying for the nursing program and the pre-requisites are done with the program once you are in it so I have not done any anatomy, physciology or any of that stuff but I am taking math, english and computers (mini classes) while waiting to join my school's nursing programe. The problem I have is I never took any sciences in high school and even though your explanation is good, I wish I knew what you are talking about but because I never did any sciences, I do not understand that beautiful explanation of the thingies. Any way I will have to purchase the ATI study guide and their practice test though it is really costly. Any idea where I can get a used one? I googled TEAS study guide and came across a book called "Secrets of the TEAS Exam Study Guide" by Morrison Media. It is like 36 dollars and I am wondering whether any of you have bought one. If anybody is selling their study guide or knows where I can get a used one, please let me know.