I’ve been practicing for SAT Math L2 and Chemistry for a while.
Interestingly, I can get 800 on two of the practice tests on Barron’s SAT Math Level 2 (and I kept getting the idea that it’s relatively harder than the real tests). Prior to that I used the 15 realistic tests (It’s a lot harder!) I just did another practice test from ARCO SAT Math L2 and got a horrible score (710). How can this be? I assume part of it was that I took it just now and was kinda in a rush since I have the actual test this weekend!!! Which (Barron’s, ARCO) would you say is closer to the real test?
Also, I took the SAT CHM last year and did it poorly and I’m about to take it again this weekend. The scores are pretty consistent no matter what type of material I’m using. 
But I DO NEED TO GET AN 800 (so as for SAT Math L2)!!!