The Pythagoras Dragon


Spark your child's passion for school geometry and algebra with the The Pythagoras Dragon, an engaging and fun grade 8+ math lesson that builds middle school students' math skills by using the chess grid to explore an ancient proof of the Pythagoras theorem. Delivered through a cartoon adventure to aid learning of abstract concepts, the eBook is written in clear, plain and simple English by experienced teachers. Read more.



The Pythagoras Dragon builds math learning skills in algebra and geometry for middle school students.

Using the chess grid to teach a twelfth-century proof of the Pythagorean theorem by the Indian mathematician Bhaskara II, the math lesson is communicated in simple, clear, and plain English through a cartoon fairytale about the ancient Chinese emperor Qinzong of the Song Dynasty.

Information for Parents and Teachers

Written and edited by professional math teachers, the educational content gives middle school students in U.S. grade 8 and higher (about 12 years old and up) a carefully designed math lesson on geometry through “think alouds” in the cartoon story, covering important strategic areas of geometry education associated with squares and triangles.

The Pythagoras Dragon enables middle school students to benefit from a fuller understanding of what the statement a2 + b2 = c2 actually means as a practical application and why the Pythagorean theorem works, and explores the underlying logic of why Pythagoras’s theorem makes sense.

The math content is aligned with the U.S. National Council of Teachers of Mathematics (NCTM) Curriculum Focal Points.

The integrated chess pattern is adapted from the Dragon Variation of the Sicilian defense game played between Grandmaster Anatoly Karpov and Richard Webb at the Lloyds Bank Chess Tournament in 1977.

Additional information





Volume in Series


Publication Date


On Sale




BISAC Subject Codes

EDU029010 Education / Teaching Methods & Materials / Mathematics; JNF035000 Juvenile Nonfiction / Mathematics / General; JNF035050 Juvenile Nonfiction / Mathematics / Geometry; MAT000000 Mathematics / General; MAT002000 Mathematics / Algebra / General; MAT012000 MATHEMATICS / Geometry / General; MAT025000 Mathematics / Recreations & Games; CGN004070 Comics & Graphic Novels / Science Fiction


Yamie Chess Ltd.

Series Math Editor

Gerardo Morabito, B.S., Mechanical Engineering, California Institute of Technology (Caltech).

Classic Chess Editor

International Master Thomas J. Bartell (USA), 4-time New Jersey and Pennsylvania Chess Champion.

U.S. Grade School Level

Grades 8 and Up

Age Group


Print Length

67 pages

Text to Speech