![Venn and Euler diagrams](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/venn_euler_header.png?itok=Gy4vd2rc)
Venn and Euler Diagrams
Backgrounders
Learn about two ways of representing sets - Venn and Euler diagrams.
![Algebraic equation for the sum of a series of numbers](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/sum-of-a-series-picture.jpg?itok=seDS11EP)
Gauss Summation
Backgrounders
Learn about the history and math of the Gauss Summation.
![Model of a set](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/set_model_0.jpg?itok=dF69Ri8v)
Set Theory
Backgrounders
Learn about how we can describe sets and subsets of numbers.
![Girl working at blackboard](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/girl_doing_multiplication.jpg?itok=WjMWgLOG)
Prime Factors
Backgrounders
Learn about prime factorization and least common multiples.
![Child holding a clock](/sites/default/files/styles/resource_card_image_360x300_/public/2021-01/child_holding_clock.jpg?itok=iuKfA-8D)
Modular Arithmetic
Backgrounders
Learn about a special type of math called clock math.
![A mole and the number of atoms or molecules in a mole](/sites/default/files/styles/resource_card_image_360x300_/public/2020-07/mole_on_hill.jpg?itok=K06_BGPZ)
Moles and Molarity: Counting and Chemistry from Donuts to Soap
STEM Explained
To count tiny things like atoms and molecules, scientists use a measurement called the mole.