I contacted Charles after I took the GMATs once – I had studied on my own and had not done as well as I would have liked. I talked to a few tutors and Charles really stuck out. Well, working with him has been even better than I had hoped for.

First of all, Charles is a brilliant teacher. He’s been able to explain both simple and complex concepts in ways that make sense to me. I know that not all tutors have this ability. Charles is exceptional in this way.

Second, his lessons are customized. When, for instance, I or Charles noticed that I was having trouble with a certain concept, he would send me questions just related to that concept. I really valued his ability to create lessons focusing on my weaknesses.

Third, he is unbelievably organized. On my first day, he gave me a perfectly organized binder, and each week we add questions to it. He promptly responds to my emails, has fun ways of organizing questions and helping me improve, and is always on time and prepared. It makes my life easy – I can just focus on improving my skills.

I owe Charles many thanks for improving my GMAT scores, but also owe him thanks for helping me become, as he calls it, a “quant.”

Charles is a pleasure to work with. I highly recommend his tutoring.



“To be perfectly honest, Charles is one of the best instructors I have ever had. I began working with Charles several months ago to assist me in improving my quantitative skills in preparation for the GMAT for my application to business school.

Prior to working with Charles, I had gone through the Kaplan GMAT course, which, in my opinion, is a complete waste of time, energy, and money. Not only did my score not improve with Kaplan, it actually got worse.

I have continued to work with Charles because he is effective. My quantitative scores on the GMAT, as measured by practice tests which I self administer, have improved 150 points since B.C. (before Charles) and they continue to climb.

I credit Charles’ mastery of the material, his student focused instruction, and his commitment to his students growth to as being key to his success as a tutor. Charles has helped me build significant confidence in myself, as a student with a learning disability, which has driven real results. The nature of his instruction alone demonstrates a commitment to the development of the whole person, which is unique to the mundane world of the GMAT.

Working with Charles has been one of the best investments I have made. I would wholeheartedly recommend him to anyone who wanted to build a quantitative skill-set to any degree and have a little fun in doing so too.

– Brian Tripp

Thank you for all of your help during our time together. You have taught me so much about how to use and apply math and helped me grow as a person. The confidence you have instilled in me and my abilities I truly appreciate. Thank you for all of your help and kindness. I wish you and Martha nothing but the best!


On the following day Janine wrote to say that her math score on the GMAT had risen from the 18th percentile to the 50th percentile.

Working with Charles has truly changed the way I experience math. I first met Charles when looking for a GMAT tutor to help me improve my quantitative score. I never knew then that he would forever change the way I approach math in general. Since my elementary school years when I started to become confused by algebra and geometry, I thought of math as a subject that I was simply not good at, and one that I could never be good at. That fear has haunted me my entire life, hence the reason I needed a GMAT tutor!

After my first phone call with Charles, I knew he would work wonders for my GMAT preparation but I never imagined that he would also alter the way I view math. He is diligent and caters each lesson and each homework assignment to each student. Before I ever met with him in person, he had assessed my current math level and planned how our first lesson would go, to ensure that no precious meeting time was wasted. Charles has the unique ability to hone in on the areas (not only intellectually but emotionally) that hinder a student from achieving mathematical success, then works thoroughly to help that student overcome those areas of weakness. He is also extremely patient and makes the process of re-learning math fun and easy. Although I have taken the GMAT, I plan to still meet with Charles so that I can continue on the path of improving my math abilities.

If you are looking for a tutor who will dedicate his time and efforts towards your individual learning style and needs, Charles is undoubtedly the person you are looking for. I cannot recommend him highly enough! And Charles, I thank you sincerely for all that you have done to help me overcome my fear of math!

– Sofia

Abby came to me to study for the math portion of the GRE, which is somewhat similar to the math portion of the GMAT. As she writes in her testimonial, she didn’t know or remember even how to add fractions. She had only seven one-hour meetings with me, and yet when she took the test she got 700 in the math portion. (The scores in the GRE run from 200 to 800, and 700 is considered very good.)

I wanted to let you know that I took the GRE last week, and scored a 1420, with a full 700 of those points coming from the math section! Pretty good when you consider that I didn’t know my multiplication tables or how to add fractions when we started working together.

Even more impressive in my mind is that I scored 740 and 760 on the math sections of the two CAT GREs that the ETS makes available on-line. Of course the perfectionist in me would have liked to have seen these numbers come out on the final test, but I was anxious, and just knowing for myself that I can do this well is SUCH an incredible feeling.

Honestly, as you know, I had a lot of math anxiety when I came to see you. Beyond making me nervous for the GRE and for grad school, it somewhat determined how I viewed myself. I always thought, I seem to be able to keep up with the smartest people that I know, but I know that I could never perform as well as them on standardized tests like the GRE. Knowing that I can do this well gives me so much confidence in everyday life, it’s amazing. It also has taken away a lot of the worry I had about grad school, and has made me just entirely excited for it.

After we had our last session, I mostly just hunkered down and studied on my own. I did see a friend of a friend for one session – he saw me for $50, and I was told he was really good. I realized almost immediately in starting to work with him the wisdom and great skill that you have to offer. While you always knew that I could do math, he seemed to question it. The ONLY reason i didn’t break down and believe him is because of my time with you. For that, I am so grateful. Also, where it was incredibly difficult for me to follow his explanations, you had always offered crystal-clear guidance that made numbers fundamentally make sense in a way that they never had before.

My parents and all my friends are aware of what an incredible impact you had. I cannot reccomend you highly enough. Thank you SO much for everything!!!


I needed serious help with the Math Section of the GMAT. I tried using the GMAT books and other tutors the first time around and didn’t have much success. Charles was the most thorough tutor I saw. He is the only tutor that gave me extra work to practice the GMAT problems. The extra work gave me a chance to practice at home what we discussed in the session. Other tutors gave me an hour of their time and that was it. Charles even gave me a book that taught me how to read word problems. I have always been the type of person that said “I just don’t get math”, but Charles’ easy to understand examples and explanations actually made learning math enjoyable. After 6 sessions with Charles, my math score on the GMAT substantially and I scored better on the math section than I did on the verbal section, remarkable considering my previous experiences with math.


Thanks for all your help, I really appreciated our sessions together. Your approach made me more confident going into the GMAT exam and I was able to remain calm for the quantitative section.


I wanted to let you know that my GRE’s were successful. I went up 100 points in the verbal section and another 50 points in math (to a 690!!!!). Thank you for all your help.


I first began studying with Charles Robinson in November of 1992 when I was preparing for the Graduate Record Exam (GRE). I have a learning disability and have always had some difficulty with certain mathematical concepts. As a result of my work with Charles, I obtained a high score on the GRE that represents my real abilities.

What impresses me most about Charles is his patience. He is willing to explain a concept again and again. There were many concepts in algebra which I did not yet have a complete grasp of. I often had to go over the same principle with Charles many times before I understood it. He was always patient. What also impresses me is his ability to explain difficult or abstract concepts in a clear and understandable way. When explaining a math problem he often uses analogies, diagrams, and even models. In addition, he did not expect me to learn his way, but rather helped me to find the most comfortable and productive way for me to learn. He expected me only to try my best as a student. He has a deep understanding of math and science and is thus able to boil it down to its elemental principles. Charles has also expressed his willingness to work with me on studying material with which he is unfamiliar. He is amiable and approachable, and always accommodating with scheduling.



I took two accounting courses as an undergraduate, but what I learned for 1 hour with Dr. Charles made Accounting clearer than the two courses I took in college.



I helped Saul when he and I were both in high school. When I encountered Saul in October 2002, this is what he wrote for me.

Charles E. Robinson tutored me in the essentials of high school mathematics and algebra and raised my understanding of these essential thought processes. I used these concepts throughout my life, not only to do well in my high school courses and have the necessary grades to get into Brandeis, but throughout my life, in my vocation and in my personal life.