Are you one of the GMAT candidates who has been having trouble with Sentence Correction? Have you found that it's holding you back from that high GMAT score you need? Do you feel that it's an obstacle to your admission to the business school or university of your choice?
Perhaps you've tried some of the GMAT prep material that's around. Not impressed? Too many long sections on theory, and too few opportuities to practice? Or maybe the other scenario: not enough substance in the book or online course for you to get a real grip on the subject!