Jeff Sackmann
About the Author
Jeff Sackmann has been helping students like you reach their GMAT score goals for nearly a decade. Jeff began as a star tutor and classroom teacher for a big test-prep company. Since 2006, he has focused on developing the best materials in the industry, saving you time, money, and stress.
Based in New York City, Jeff has created many resources for GMAT preparation, including the popular Total GMAT Math and Total GMAT Verbal, as well as 1,800 practice GMAT math questions and his Guides to the Official Guide.
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More GMAT Success Stories


One of the best parts about my job is hearing from students after they conquer the GMAT. I've gotten a couple of emails lately that I'd like to share with you.

First, from Alex H., who I've been working with for the last few weeks:

I just got back from the GMAT. I got a 750!

I wanted to say thank you for all of your help. The majority of my success on the test was due to our tutoring sessions. Thanks again.

Second, a customer discovered that Total GMAT Math is very well-suited to his studying style:

I especially like the fact that your guides are available by .pdf. Because they are .pdf, they are really easy to search for content . Also, I can print-out or work from the computer as needed, especially if my eyes are too tired from staring at computers all day at work.

You can read a lot more comments from students and customers by clicking here for my Testimonials page.