Testimonials
You can read about my background as a test-prep tutor and developer by clicking here, or read more about the services I offer in person or by phone.
One-on-one Tutoring Clients
In the past few months alone, several of my students have scored a 700 or higher, including a 750 and a 770! Here's what a few of my clients and readers have said about me.
Victoria took the test twice, and her second try came after a few months of hard work, including meeting with me 2-3 times per month:
Anyway my second and final score is...740!! Q48 V44. Thank you!
Adam improved his score from a 620 to a 690, and is now studying at Wharton:
Your tutoring was exactly what I needed to dramatically improve my score. Thanks again!
Jim hadn't looked at a math problem in nearly a decade, yet climbed all the way to a 680 on test day!
Thanks for all of you help over the last several weeks. I couldn't have gotten this far without it.
Kyle M. had taken the test before, but after several sessions with me, she got the score she needed to get into the program of her choice:
I just want to let you know that I was accepted at Columbia Business School - Executive Program and will be attending this fall. Thanks again for all of your help with my GMAT. It's nice to know that all the hard work finally paid off :). I keep referring my friends to you for GMAT help, so hopefully you'll see some of our other friends soon too!
Taylor met with me twice, and will never have to think about the GMAT again:
I re-took the GMAT and scored over 700, which was my goal. Columbia admitted me a few months ago, so I'll be heading there in the fall.
One meeting was enough to help Ray achieve his goal:
I took the test on Friday and boosted my score by 40 points to a 680. Although we never ended up meeting for a 2nd time, the information on your website, the OG explanations and your newsletters especially were very helpful.
After several weeks of tutoring, Jillian improved her score by more than 200 points!
I did it!!! Can you believe it? Thank you so much for all of your help. I could have never done it without you.
Readers, Subscribers, and Customers
Brandon found that The GMAT Math Bible made all the difference. You can read the full version of his post-test report here.
Having used virtually every study material available (OG, Princeton, Kaplan), the Math Bible is far and away the best study material available. Princeton Review's Math Review is junk in comparison. It was the best $50 I've ever spent.
Pierre was able to put my advice to good use:
You have the best website out there discussing the GMAT, from its layout to the diversity of topics covered. Your explanations are clear and to the point which is refreshing considering the amount of useless info one has to go through in order to get to something interesting on other websites. Following some of your guidance I got a 680 today on the test.
Kyle S. scored nearly as well as I did:
Thanks for your GMAT tips blog. I just took the test today and using a combination of two books (the kaplan gmat and gmat 800 books) and your blog, I scored a 760! I couldn't have done it without your advice.
I always love triple-digit GMAT score increases! Mike wrote in with his story:
I found your site to be an excellent source of information in preparation for the GMAT. I first took the GMAT last Feb. and did not score well. The problem was the material and method I used to study. After several months of preparation and utilization of tips from your site - like purchasing the Official GMAT Guide, avoiding long division, and factoring - I improved my score by 130 points. I also found your guidance to be very positive in nature yet honest in helping me establish a realistic score goal.
Jessica found that my advice was the missing link:
First of all, I want to say thank you for all of your great posts. I took the GMAT on December 30, and prepped using the Kaplan book/cd and math study guide. While I felt comfortable and ready for the material, I still felt like my test attitude and mental readiness were lacking. Your blog helped round out some of the edges and helped me look at the test differently. Reading your posts was like having my own coach, and I truly appreciate it. I didn't feel like I was alone on test day.
Ryan is ready to move on to the next step:
I again just wanted to extend my thanks for creating and maintaining the site. I took my test yesterday and achieved my goal. You're advice was complete and utterly sound, and I will be certain to recommend your site and study materials to any potential test taker.
Charles couldn't have done much better. In fact, if he ever wants a career change, perhaps he should consider GMAT tutoring!
Jeff, I just wanted to thank you for your tips and practice problems. They helped me get a 770 on the exam last Saturday. I will definitely recommend your site and your books to my friends who are studying for the GMAT.
Arthur discovered that my exclusive problem sets were exactly what he needed:
These banks of questions are excellent. I am finding them an enormous help.
Ryan K. recently earned a score that will get him strong consideration at whatever business schools he applies to:
With much help for your website and practice problem sets I scored a 750. Thanks so much for all you do - it is very much appreciated. In fact, I've got a few of my co-workers hooked on your site.
Kareem looked far and wide for quality GMAT advice on the web, and finally found it here:
There are alot of GMAT related websites on the web but your site is by far the best. You give honest advice and tips that will work.
If my resources or tips have helped you meet your goals of scoring well on the GMAT and getting into the business school of your choice, drop me a line. I'd love to hear about it!
Sign up for the GMAT HACKS Newsletter and get free GMAT practice questions in your inbox every Friday!
Jeff Sackmann is a GMAT tutor based in New York City. He has created many resources for GMAT preparation, including several sets of practice questions and his popular GMAT Math Bible.
Need a better Quant score? Check out The GMAT Math Bible.