Dr. Gary R. Gruber

Dr. Gary R. Gruber is recognized as the leading authority on standardized tests and the originator of the critical thinking skills used to prepare for them. The author of more than 40 books with over 7 million copies sold, his lifelong mission is to get the nation to be passionate about problem solving and to develop and hone critical thinking abilities. Check out his website: www.drgarygruber.com.

Articles by this Author

Kids & Families Feature
June 26, 2014

The good doctor is back to baffle you with more logic. Are you up to the challenge?

More "Dr. Gary Gruber's Brain Teasers, Vol. 4" »
Kids & Families Feature
May 15, 2014

Sharpen your wits, the doctor has another set of puzzlers for you.

More "Dr. Gary Gruber's Brain Teasers, Vol. 3" »
Kids & Families Feature
April 9, 2014

It’s time once again to pit your problem-solving skills against the good doctor.

More "Dr. Gary Gruber's Brain Teasers, Vol. 2" »
Kids & Families Feature
March 20, 2014

Like problem solving? Try these music-related brain teasers from Marin’s famous test-taking strategist.

More "Dr. Gary Gruber's Brain Teasers, Vol. 1" »