Mark is extremely helpful in helping me studying the GMAT. He is patient in guiding me how to solve each question. I started having full course, then later sign up for his private tutoring along the side. I would recommend him to my friends!
Since I am not a native English speaker, I have no problem studying math on my own, however, Verbal section is my weak part. Mark and I spend most of our time working on verbal, and improved it from 17 to 34. Comparing other course I have taken, his private tutor session is the best part of studying month. I appreciated his help and would give him a 5 star review!
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