What follows is a post made by "peace2c" (who I believe is affiliated with dat achiever) on July 21st.
"Sciences in DAT Achiever are truly more difficult than any other test guide especially in Test 3, as many of the question structures have been so designed to cover as much details as possible in relation to syllabus outlined by the ADA. Each of the question attempted has'd Topic (Sub-Topic) assigned to it in the Detail Report. You should print this out to further guide you what to study more from your textbook and tally this with the answer explanations given. Maths shouldn't be that bad but again it varies on different individuals (Lots of practice will make it better if not perfect)
Real DAT questions noted by me appearing in DAT Achiever worth your attention:
Bio : Test 1 (Q2, 4 , & 7), Test 2 (Q11, 32, 37, & 39), Test 3 (Q2, 30, & 33)
Maths: Test 1 (Q34 & 37), Test 2 (Q5, 14, 17, & 38), Test 3 (Q34)
Kaplan's Review Notes alone do not comprehensively cover all you need to know for the DAT. There's no big deal if you can answer many of their questions in the practice tests since many of these have been based on what you've studied from the BB notes. All test guides should instead be wisely used to prompt you work harder and turn to your complete sources in the texts when needed.
Generally, to get 21-23, you should not be missing more than 10% of the questions in each section.
Schaum bio is good if you still have the time for it.
Let me know if you've any more questions to ask."