Manhattan Prep - Shelton Windham

I took the complete GMAT prep course with Shelton, and it was a great experience. He delivered really high-quality, exploratory lectures that really dove into the heart of what the GMAT tests: logic. My first practice score was a 580, and I ended up with a 760 when I finally took the GMAT.

I saw my practice test scores go up considerably during the duration of the course, and kept studying on my own well past the end of the class. My time with Shelton proved more valuable the longer I studied, and I really credit a lot of my success both to his actual instruction and his methodical way of teaching his students to analyze their own weaknesses and address them head-on.

There are no miracles when it comes to test-prep, and you won't wake up with a 700+ score if you don't put in the effort. If you're willing to work for it, though, there's no better choice than Shelton to get you up-to-snuff with the material.