All materials

Is AI harmful? Parents, educators & students weigh in

We surveyed 1,442 parents, teachers, and students to answer a question that keeps us up at night too: is AI quietly doing our kids' thinking for them? The results that we analyzed do not say yes or no, it's about who stays in control.

What is a quadrillion? Big numbers and their illion suffix

Why is Google named the way it is? And why does a quadrillion sound so huge, even though it is just one step in a simple naming system for big numbers? Learn where the "illion" suffix comes from, how to read numbers like million, billion, and sextillion, and why names such as "quadrillion" are often easier than long strings of zeros

Same math, different division and multiplication ways

Peter Rabbit and his friends are planning a trip on a train with 250 seats. How many full groups of 6 can fit on the train, and how many seats are left over? This is a fun way to explore how kids from different regions of the world write long division differently on paper.

Circumference over diameter, the Pi constant and its history

Calculated by Archimedes, Newton, and now modern computers, Pi has fascinated mathematicians for centuries. It is not only 3.14159, but a symbol of the infinite and the irrational, a fundamental constant of curved space.

Who invented rectangles, and why they developed their math

Invention of rectangles and related mathematics by hunters who traded mammoth hunts for measuring fields and shaping the first farms

The history of three old friends. Sine, Cosine, and Tangent

Historical origins of the sine, cosine and tangent. Learn the origin of these terms, from the ancient India to the Latin mistranslation that gave us "sine"

What is the Imaginary Unit? Complex numbers explained simply

Ever tried to find the square root of a negative number? Discover the impossible 'imaginary' number that breaks the rules and keeps aircrafts safely in the sky

Who invented triangles and proved the 180 degrees rule

The rule of right triangles and the man who discovered it

The rule discovered by the father of a well-known theorem, the Pythagorean theorem, defines the lengths of all three sides of a right triangle

Speaking the language of symbols: Amazing Linguistics of Mathematics

Mathematics as a universal formal language, symbols of the alphabet with no accent or country, understood everywhere without a pronounced word

From a man's name to a word. The birth of Algorithm

You pronounce his name several times every day; if you are a student, you have a book on your desk with a word as the name of the subject that he introduced. He had no calculator, no A4 paper, and no electricity after sunset, no Lego to describe his approach to children, yet he quietly invented the two ideas running our world today.