How effective do you think the Collegeboard Official SAT Online Course is?

Hi and welcome to my blog,
I opened this blog to help anyone who is preparing for his SAT.
I remember myself when I started - I was so lost and in such a panic.
Luckily I got this great SAT guide that helped me a lot . So study hard and good luck!
I am a junior in high school taking the SAT this march and I have been trying to study by myself to save money. On recent practice tests, I have gotten scores like 1850/1860 and my goal for my first attempt at the SAT is above a 1950 [getting above a 1950 means my parents will let me go on vacation with my friend's family this summer!]. I just enrolled in this online course a couple days ago and I have three weeks to improve my grade. My breakdown was as follows: Critical Reading- Writing- 650 and Math-650. I feel like i should be able to get at least around a 750 in math because I’m in Calculus, so maybe i was just having a bad day. Do you think the Collegeboard Online SAT course will help me or should i do something else? Also, what other ways are good to study at this point? Please take some time to answer. Thank you!
Most think that the course is excellent./
Collegeboard’s very mission statement is to inconvenience you in any way possible. Thus, I’d take anything they declare to be "official" or "certified" with a grain of salt.
At the end of the day, it can only be viewed as a super-big corporation that wants your money.