If you didn't fully comprehend the content of the passage for RC, then we have a major challenge. Try to supplement some
GMAT Fiction with your studies. It won't deliver miracles, but you might feel more comfortable with RC passages and increase your reading speed. Also, look into the
RC directory. Start with the 500-level questions and work your way up.
The Manhattan SC guidebook is the best product on the market for this subject, but it's a dry and difficult read for some. If you're having trouble with it, look into the Aristotle SC Grail. The book is cheap and comes in PDF format, so you will receive it within a day or so. That gives you sufficient time to read it. For me, a good performance in SC requires three ingredients:
1. Read an SC guidebook over and over again. The SC is based on objective rules, so you need to constantly expose yourself to them.
2. After you answer an SC question, fully read the explanation - even for the questions that you answer correctly. This is essential, as you will better understand the SC rules and the test's "logic" as well as increase your confidence.
3. Be very, very active on the SC forums. Answer as many SC questions as possible. And make sure to fully explain and defend your answer choice. This helps big time.
I was always good at CR, so perhaps my advice is not as reliable. But the Powerscore CR Bible is fantastic. Usually reading it once is enough. Repeat my suggestions found in points two and three.
Here are the directories for
SC and
CR. As with RC, start with the easiest questions and go from there. Even if the question has already been comprehensively answered, post your interpretation anyway.
I realize that this is quite a bit, but a month of hard work and dedication should result in a better verbal score.
Good luck!