I was wondering what the essential materials are to prep for the American DAT. I hope to get at least a 21AA. I don't want to take a prep course as it doesn't seem financially worthwhile. From what I know so far, people say to use the EK series (including the 1001 series for practice), CDP, and Schaum's (or something like that) Biology for the plant stuff. Should that suffice? What are everyone's suggestions? What would you add/remove? Thanks for your input!