I've been studying the ATI book for about 2 months on and off, and consistantly every day, the past month. The first time I did the practice exams in the book, I scored about 66-80% in each subject. I took the book practice exams again on Monday, and scored in the high 80's and 90's, missing at most 4 questions per subject. I bought the online practice exam today, thinking I would do well, and scored 60% all subjects combined! It was sooooooooo hard! I felt that the online practice exam had harder math and science questions. I am so nervous about taking the TEAS test tomorrow morning! I wish I would have taken the online practice exam last week, to brush up on more topics. Can anyone tell me if the actual TEAS is harder than the online practice exam?