Hey, I really don't know how some people take the Kaplan course during the semester. It is really hard to focus while you are doing other classes, etc. So, if you are a sophomore, try to follow this:
Summer this year: take Kaplan course and FOCUS on it. DONT take any summer classes/work, etc. This will be your peak studying time. I am guessing since you are a soph, you will have already been done with Bio, Ochem and Gchem... so you KNOW everything. you just need to learn how DAT asks Qs about them.
End of summer: TAKE the DAT. It sounds early. It sounds scary. but do it. If you have focused on it the whole summer, it is best to put it down on paper, eh?
If you get a good score, voila, super! 🙂 If you don't you are still ahead of the game. You have already taken the DAT once... so you are not antsy and driving yourself crazy. You knooow what you have to focus on more, you find out more resources to study from, etc. Soooo....
Winter: Study for a month or so. (BTW, since you have taken the course in the summer, you can retake the course for free "higher guarantee score". in that way, you still have kaplan's online resources 🙂 )
January: Take it again.
My story: I wanted to follow ^^^^ plan but i couldnt take it in August cuz i took Physics and i got sidetracked (I had to pull up my science gpa, so i couldnt risk it). so i studied my butt off in winter, took it now and here are my scores.
(by the way, if anyone else is reading, please do comment in my scores. honestly please!)
Perceptual Ability 21
Quantative Reasoning: 19
Reading Comprehension: 18
Biology: 24
General Chemistry: 23
Organic Chemistry: 18
Total Science: 21
Academic Average: 20
EMPHASIS: Take it early. Take it early. So that 1. you are stress free. 2. you can focus on extra curriculars and school 3. you can apply EARLY (end of junior year - may)
hope that helps =D