SAT vocab

Hi everyone I just started prepping for the SAT so this is my first post. My question is about vocab studying. I have the blue book and Barron’s SAT 2400. I was wondering if the ~180 words at the back of Barron’s and maybe ~200 words from sparknotes would be sufficient for helping me get above a 700 on the critical reading. I took a practice SAT about a week ago without any preparation whatsoever and I got a 600 on the critical reading. Also I’ve heard about several books for the vocab such as direct hits. I was wondering if buying one of these books would make a huge difference over using free resources.

this isn’t my own recommendation, infact it’s a famous thread on here.

what he recommended was to make flashcards of all the words you don’t know in the official study guide and memorize them.

that’s what i’m going to do anyway. but don’t take my word for it (cr is my worst section)