This lesson focuses on prime numbers, numbers that can only be divided by one and itself. It explains the Fundamental Theorem of Arithmetic and the Sieve of Eratosthenes. Includes practice activities.

This lesson focuses on probability, a number between 0 and 1 which describes the likelihood of a certain event. A probability of 0 means that something is impossible; a probability of 1 means that something is certain.

There are a few different rules that can make it easy to check if a number is divisible by another. In this lesson you will learn some of them such as,any number that ends in 0, 2, 4, 6, or 8 is divisible by 2, divisibility by 5 we...

Travel through time and explore the greatest mathematicians and the biggest mathematical discoveries in history. Click on any name for brief biographical details.

This lesson is an introduction to triangles and trigonometry by looking at the history of mapping and specifically, measuring the height of a mountain.

This lesson focuses on dilations, a dilation is a transformation that resizes a geometric shape, by making it bigger or smaller.

This lesson focuses on the Triangle Inequality, when the sum of the lengths of any two sides of a triangle is greater than the length of the third. When this happens, the three sides cannot form a triangle.

This lesson focuses on arithmetic and geometric sequences using several examples and practice exercises.

Rather than dividing a circle into some number of segments (like 360 degrees), mathematicians often prefer to measure angles using the circumference of a unit circle - a circle with radius 1. This way of measuring angles is called...

Explore this course in logic, sets, and proof including topics of axioms, set theory, and proof by contradiction and induction.

Explore this course in imaginary and complex numbers including topics of integers, real numbers, infinity, transcendental numbers, imaginary and complex numbers.

Explore this course on infinity the including topics of the continuum hypothesis, Cantor's diagonal, and countability.

Explore this course in fractals and dimensions including topics of The Sierpinski Gasket, The Mandelbrot Set, fractals in nature and technology, and fractals in 3-dimensional space.

The mathematical treasure hunt allows young scholars to follow a trail of clues and mathematical problems around the school site; each clue contains a hint to where the next clue is hidden.

The mathematical treasure hunt allows young scholars to follow a trail of clues and mathematical problems around the school site; each clue contains a hint to where the next clue is hidden.

This lesson provides real life applications for divisibility and prime numbers including the Cicada Cycle's use of prime numbers and Cryptography,encryption.

This lesson focuses on Combinatorics, a branch of mathematics which is about counting. It includes 5 sections: Factorials, Permutations, Combinations, Combinatorics and Pascal's Triangle, and Combinatorics and Probability with examples...

This lesson focuses on the probability and casino games such as Roulette which consists of a wheel with the numbers from 1 to 36 colored in red and black, as well as a green 0. A ball rolls around the outside and randomly lands on one of...

These beautiful flash cards use spaced repetition to teach multiplication facts. Achieve fluency with just five minutes of practice per day!

When Alice falls down the rabbit hole, she discovers a wonderful world of mathematics: Pascal's triangle, sequences of rabbit generations, and beautiful, never-ending fractals.