Lesson Plan
Curated OER

Properties of Fractals

For Teachers All
Students build a working definition of regular fractal, look carefully at the concepts of dimension and scale, and are introduced to logarithms. They solve simple exponential equations for the exponent both by trial and error and using...
Lesson Plan
Curated OER

Measuring The Earth

For Teachers 9th - 12th
High schoolers use their geometry and trigonometry skills to determine the distance between their school and another school.
Lesson Plan
Curated OER

Properties of Fractals

For Teachers 6th - 8th
Young scholars build a working definition of a regular fractal, they measure the concepts of dimensions and scale, they explore the concept of a logarithm and they attempt to solve simple exponential equations for the exponent both by...
Unit Plan
Cuemath

Cuemath: Euclidean Geometry

For Students 9th - 10th Standards
Explore the world of Euclidean geometry by understanding euclidean and non-euclidean geometry, the postulates and axioms, and how to apply them while solving problems. Check-out the solved examples for better understanding and try your...
Handout
University of St. Andrews (UK)

University of St. Andrews: Non Euclidean Geometry

For Students 9th - 10th
The University of St. Andrews in Scotland provides an excellent site explaining Non-Euclidean geometry.
eBook
Mathigon

Mathigon: Geometry: Euclidean Geometry: Definitions

For Students 9th - 10th Standards
This lesson focuses on Euclidean Geometry terminology; such as line, point, line segment, congruence, circle, radius, ray, and more. It defines each term and provides an example of each.
eBook
Mathigon

Mathigon: Euclidean Geometry: Origami and Paper Folding

For Students 9th - 10th Standards
This lesson focuses on a different way to construct geometric figures without tools, Origami. The goal is to make objects out of one or more sheets of paper, without any additional tools like glue or scissors. You can create incredibly...
Activity
Oswego City School District

Regents Exam Prep Center: Indirect Euclidean Proofs

For Students 9th - 10th
This Oswego City School District Regents Exam Prep site shows you how to proof something by showing that it is false. This look at indirect proofs includes a practice and a teacher resource page, which features a warm-up activity.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Writing a Proof: Direct Euclidean Proofs

For Students 9th - 10th Standards
This site is a look into the world of geometric proofs. You'll learn what a proof is and about the different types of proofs. Try the practice page to check your understanding. Teachers can check out the teacher resources for lesson and...
eBook
Mathigon

Mathigon: Euclidean Geometry: Geometric Construction

For Students 9th - 10th Standards
This lesson focuses on the history of geometric construction beginning with Euclid's Axioms to the simple tools such as the straight edge and the compass.
eBook
Mathigon

Mathigon: Euclidean Geometry: Euclid's Axioms

For Students 9th - 10th Standards
This lesson focuses on Euclid's Axioms, simple, intuitive statements, that everyone agrees are true. An axiom(or postulate) is a mathematical statement that is regarded as "self-evident" and accepted without proof. A key part of...
eBook
Mathigon

Mathigon: Euclidean Geometry: Introduction

For Students 9th - 10th Standards
Mathematicians in ancient Greece were amazed by mathematical patterns, and wanted to explore and explain them. They began to study mathematics just "for fun" without a specific application in mind. One of these mathematicians, Thales of...
Article
Khan Academy

Khan Academy: The Euclidean Algorithm

For Students 9th - 10th
As related to cryptography, understanding and providing proof of the Euclidian Algorithm.
Unit Plan
Oswego City School District

Regents Exam Prep Center: Lines and Planes

For Teachers 9th - 10th
Use these resources in preparing instruction on undefined terms (points, lines, and planes), theorems relating lines and planes, and Euclidean and non-Euclidean geometry. You'll find three lessons on the aforementioned subject areas, an...
Activity
University of Regina (Canada)

University of Regina: Math Central: Greatest Common Divisor and Least Common Multiple

For Students 9th - 10th
Learn about the greatest common divisor, the least common multiple, and the Euclidean Algorithm. This resource gives a description of each of these concepts, accompanied by several examples.
Unit Plan
Wolfram Research

Wolfram Math World: Distance

For Students 9th - 10th
MathWorld.com gives a formula for finding distance using the Pythagorean theorem. The formula for finding the distance between two points in Euclidean space is given on this page. The page has links to related topics.
Article
Khan Academy

Khan Academy: Intro to Vectors

For Students 9th - 10th
An introduction to the most basic building block for programming motion--the vector. In JavaScript referring to a Euclidean vector defined as an entity that has both magnitude and direction.
Handout
Wolfram Research

Wolfram Mathworld: Elliptic Geometry

For Students 9th - 10th Standards
MathWorld offers a brief definition of elliptic geometry and including a brief discussion of its relationship to Euclidean geometry, with links to other related definitions.
Lesson Plan
City University of New York

Lehman College: An Introduction to Lines

For Teachers 9th - 10th Standards
Use this site for two short lesson plans regarding Euclidean and Spherical lines. Intersecting and parallel lines are discussed. The lesson contains activities for two days of class.
Website
Wolfram Research

Wolfram Math World: Euclid: The Elements

For Students 6th - 8th
The classic treatise in geometry written by Euclid is presented in English. It is the textbook used for more than 1,000 years in western Europe.
Activity
Wolfram Research

Wolfram Math World: Golden Ratio

For Students 9th - 10th
Math World explains the Golden Ratio, gives the formula for finding the irrational number, and expresses this value as an infinite series. Also defines and represents the Ratio geometrically, its relationship to the Fibonacci numbers,...
Website
Wolfram Research

Wolfram Math World: Geometry

For Students 9th - 10th
This MathWorld tutorial provides detailed overviews of the concepts and theorems associated with geometry. Most of the Math World sites are extensive and some require higher math knowledge to understand, links to terms and topics are...
Lesson Plan
Shodor Education Foundation

Shodor Interactivate: Lesson: The Mandelbrot Set

For Teachers 9th - 10th
In this instructional activity students will explore Julia sets and the Mandelbrot set. In the process they will learn about fractals and explore complex numbers and function iteration.
Activity
University of Massachusetts

Fractal Project: Exploring Fractals

For Students 9th - 10th
A good beginner's site for fractals - the language is straightforward and requires only minimal experience to be able to understand the topic. (Note: When clicking on links on archived site, they may pause and appear not to be found...

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