Test of Essential Academic Skills. 4 parts. Math, Science, English, Reading.
I got ATI study guide but it was so hard I couldn't even use it. Anyway, I went and took TEAS and got 88% first time and 91% second time (only got 76% with ATI on-line practice exam) which was enough for RN at Ivy Tech Bloomington.
What helped me the most was the "chemical basis of life" in ANP 101. For me, the chemcial science was the hardest part. Normally, math would have stumped me, but I had just finished college algebra when I took TEAS and the math on it isn't as hard as MAT 111.