Don't worry – it is normal to learn new things and to have your score decrease temporarily
as you figure out how to use the new tools. However, play to your strengths. You do not need to memorize every grammar rule to be good at sentence correction
. I would focus on the major things: agreement/parallelism/modifiers. Start there with every SC. Then you can branch out to other things that you know (idioms, verb tense). Also, focus on the meaning of the sentence
. There is a balance on the GMAT between rules and common sense. When you don't know rules we use common sense but when we start learning rules we forget about common sense. It is important to have both. I hope this helps.
"It is a curious property of research activity that after the problem has been solved the solution seems obvious. This is true not only for those who have not previously been acquainted with the problem, but also for those who have worked over it for years." -Dr. Edwin Land
GMAT Sample Questions to assess your GMAT Quant.
If you found my post useful KUDOS are much appreciated.
IMPROVE YOUR READING COMPREHENSION with the ECONOMIST READING COMPREHENSION CHALLENGE:
Here is the first set along with some strategies for approaching this work: http://gmatclub.com/forum/the-economist-reading-comprehension-challenge-151479.html