SAT + math II + biology

Hallo everyone
I’m a German students who finished school this year and I’ll probably take my SAT’s in October. (I’ll probbly have to mention that I want at least a 2270 in the SAT and at least a 750 in the subject tests.)
I just have a few questions, so please bare with me.

  1. I Just started preparing myself for the SAT with the black book and the blue book, do you think that’s enough or do I need more material? (I also have the grubers, mc graw hill and the barons 2400 at home, but I haven’t used them yet.)
  2. What books do you recommend for math II and biology?
  3. Which calculator do you recommend for math II? I have two a Casio fx-86DE Plus and a Casio fx-9860GII(which I haven’t used in ages)
  4. Would you recommend doing all test on one day or would you split them up?
  5. Do you think 3 months are enough time to prepare for the three tests?
    Thank you for your help.
  1. Graphing calculator recommended, basically anything you're familiar with.
  2. You can't take the SAT and subject tests on the same day.

Check out the FAQs and book thread in this forum for SAT I preparation. Check out the subject test forum. For the SAT IIs, you should get the 2 real tests. Barrons is good for most subject tests. For the math SAT II, Dr. Chungs is also standard. Both of these books are harder than the real test.