SAT Testing

Yes, it is. But you have to find your weaknesses and drill them. If you haven't already, make a Khan Academy account and sync it to your test to see what topics you missed. Go to College Board where you can see your scores and subscores and which areas you're weakest in. Figure out why you missed the problems; go to the root causes. Did you go too fast? Did you misread the question? Do you have gaps in content? If you did the latter, then I would suggest watching tutorials online and taking notes so you don't forget, and then start practicing on those kinds of problems. If not, then practice on Khan Academy consistently every day for at least 30 minutes. Make sure the quality of your practice time is strong and that you're totally focused, even if it's for a few minutes. Don't neglect reading & writing either; you stated that you're weaker in math but even if you got an 800 in English then it never hurts to practice, although you may want to have more of an emphasis on math. Good luck! I'm taking the SAT in June too and wish you well.

I used the SAT Prep book from Kaplan. I found it to be really helpful and the practice tests were really good. You can register your book with Kaplan online which gives you access to Webinars and more practice tests that will give you an SAT score after taking it. If you don't want to spend money to buy the book, most public libraries have them. I just checked it out there.