Hi kendrikFROMkenya,
To start, with just 3 weeks of study time, there will be a limit to how much you can learn and master - so there will likely be a limit to how much you can improve your score in that time. Before I can offer you the specific advice that you’re looking for, it would help if you could provide a bit more information on how you've been studying and your goals:
Studies:
1) On what dates did you take your 2 Official GMATs and what were the Quant and Verbal Scaled Scores for each attempt?
2) How many hours do you typically study each week?
3) What study materials have you used so far?
4) On what dates did you take EACH of your CATs/mocks and how did you score on EACH (including the Quant and Verbal Scaled Scores for EACH)?
Goals:
5) How will your plans change if you do not score 560 by November 15th?
6) When are you planning to apply to Business School?
7) What Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich