About Dr. Gruber 2018-04-13T16:57:54+00:00

About Dr. Gruber

From a 90 IQ to a PhD in Physics

For over 40 years, Dr. Gruber has been recognized nationally as the leading expert on standardized tests and originator and developer of the critical thinking skills necessary for use on them. It is said that no one is better at assessing the thinking patterns of “how” a person answers questions and providing the mechanism to improve faulty thinking approaches.



Dr. Gruber’s lifelong mission is to get the nation to be passionate about problem solving and to develop and hone critical thinking abilities to last a lifetime.


In fifth grade Dr. Gruber received a 90 IQ score (below average). His father, a high school teacher at the time, was concerned but able to get a copy of the IQ test. His hope was that his son could study and increase his score. However, when a young Dr. Gruber looked at the test he became fascinated with what exactly the questions were trying to assess. As he attempted to figure out which strategies and thinking skills he should have used the first time around, Gruber quickly uncovered an interesting pattern. Two years later, when his IQ was again tested, Gruber increased his score to 126. Several years later that score soared to 150 (genius level). In fact the Washington Post later called him “America’s Super Genius”.

The initial experience of scoring so low on his first IQ test and being branded as “dull-minded” actually spurred his fascination with standardized tests. He became determined to afford all other students the knowledge and experience he had gained so that they might show their true potential. Dr. Gruber continues to write books, newspaper articles, magazine articles, and columns. He also continues to personally teach students and teachers his innovative test-taking techniques.




His SAT score improvements with students have been documented to be the highest in the nation. Dr. Gruber’s unique methods have been used by Public Television (PBS), Sylvan Learning Centers, Grolier’s Encyclopedia, and are being used by school districts throughout the country, in homes and workplaces across the nation, and by a host of other entities. PBS claimed that he spreads contagious enthusiasm with his audiences. Most recently he has trained the University of California’s teachers to create programs for specific critical thinking and problem solving skills for the minority programs. Dr. Gruber, doctorate in Physics, has published more than 40 books with major publishers on test-taking and critical thinking methods, with over 7 million copies sold. At one point, three of his books were listed among the 30 top selling trade paperback books in the nation. His books have been translated into Chinese, Russian, and Korean. The Washington Post called Gruber “America’s Super Genius”.

Gary Gruber is the Guru of Test Preparation

— Chicago Tribune

His methods make the questions seem amazingly simple to solve.

— Library Journal