by JonathanSchneider Sun Jul 05, 2009 1:34 pm
I'm glad you bring up this question, and yes, it is a concern.
We have you study problems topic-by-topic because this is the best way to learn to recognize/master that particular area. However, it is VERY IMPORTANT that you also do random sets, particularly in the final weeks of your GMAT preparation. One possibility: use the OG12 for topic-based work, but use the supplements for random sets.
Also, if you are worried about your ability to truly master any problem, download the "Review Your Work" sheet from Student Center when you log into our website (paying students only). This sheet will outline a good review process for you.