Unit Plan
Radford University

Parallel Lines Cut by a Transversal

For Teachers 9th - 12th Standards
Use the parallel lines to find your way. After first reviewing geometric constructions and the relationships between angles formed by parallel lines and a transversal, young mathematicians write proofs for theorems relating to parallel...
Study Guide
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Penguin Books

A Teacher's Guide to the Signet Classic Edition of William Shakespeare's A Midsummer Night's Dream

For Teachers 9th - Higher Ed Standards
A night in the forest, a fairy king and queen, adolescent rebellion, magic potions, love triangles, a funny play about a tragedy, a plot that, rather than running smooth, runs amok? Of course, 'Twould be a guide for teaching...
Worksheet
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K12 Reader

The Art of M.C. Escher

For Students 4th - 5th Standards
Show your class one way in which art and math are related by teaching them about M.C. Escher. Class members read a brief passage and then respond to five related questions.
Lesson Plan
Penguin Books

An Educators' Guide to Between Shades of Gray by Ruta Sepetys

For Teachers 7th - 10th Standards
Books can help teens understand complex global issues. A helpful educator's guide introduces readers to what it's like to be a refugee. Lesson components for the novel Shades of Gray include an anticipation guide and writing and...
Assessment
EngageNY

End-of-Module Assessment Task - Grade 8 Mathematics (Module 2)

For Students 8th Standards
Can your classes apply the knowledge they have learned? Use this performance task to find out! Individuals use transformations to explain congruence and angle relationships within parallel lines to find missing values. They show what...
Handout
Aurora City School District

Do Not Try to Kid a Kidder: The Art of Persuasion

For Students 9th - 12th Standards
The power to convince others of your argument lies in your knowledge of rhetoric! A thorough packet covers the basics of persuasion, including logical appeals and fallacies, and applies strategies to letters to the editor,...
Handout
Penn Museum

Penn Museum: China Gallery

For Students 6th - 12th Standards
Invite your learners to take a closer look at the art and mathematical function of dome buildings as designed by the ancient Romans. In the next segment of this attractive worksheet set, your young historians will then learn about...
Worksheet
Curated OER

Kuta Software - Infinite Geometry: Similar Triangles

For Students 9th - 12th
In this similar triangles instructional activity, students solve 20 short answer problems. Students determine if two given triangles are similar.  Students determine the type of similarity given two triangles. Students are given a...
Lesson Plan
Curated OER

Investigation - Square Numbers and Triangle Numbers

For Teachers 5th
Fifth graders investigate growth patterns using blocks. In this square and triangle numbers instructional activity, 5th graders predict sizes of larger triangles and squares based on numerical patterns they observed while building. 
Lesson Plan
Curated OER

Napolean Triangle

For Teachers 9th - 11th
Young scholars investigate the Napoleon triangle theory. For this polygon lesson, students  differentiate between the boundary points, interior and lattice point of a polygon. They apply concepts of equilateral triangles to...
Worksheet
Curated OER

A Geometry Worksheet - Similar Triangles

For Students 9th - 12th Standards
In this similar triangles worksheet, students find the scale factor of 6 sets of similar triangles. Students find the scale factor of two similar triangles given a sketch with measurements. Students use proportions to find a missing side...
Worksheet
Curated OER

Area of Triangles 2

For Students 9th - 12th
In this area of triangles worksheet, students solve 18 area of triangles problems.  Students find the area of various types of triangles given a graph of the triangle.
Worksheet
Curated OER

Triangle Fundamentals

For Students 8th - 12th
In this geometry worksheet, students observe a triangle marked with three angles and are given two measures to find the missing third measure. A second diagram is given with six angles. There are 20 questions.
Worksheet
Curated OER

Law of Sines

For Students 10th
In this Law of sines worksheet, 10th graders solve 10 different sets of problems related to the Law of Sine and Ambiguous case. First, they determine the ratio of the sides of the triangle with the given measurements. Then, students...
Lesson Plan
Curated OER

Cabri Jr. Perpendicular Bisector of a Chord

For Teachers 9th - 12th Standards
Your learners will construct the perpendicular bisector of a chord. They use Cabri Jr. to construct a circle and a perpendicular bisector of a chord. They then measure lengths of the chords and perpendicular bisectors. Learners use...
Worksheet
Curated OER

The Corners of a Square

For Students 10th
In this geometry worksheet, 10th graders cut the corners off of a square so that a regular octagon remains.  Students determine the length of each side of the octagon.  The one page worksheet contains one problem with the...
Lesson Plan
Curated OER

Triangle Puzzler

For Teachers 5th - 8th
Students are introduced to some basic concepts of geometry. They explain that the definition of a triangle is a figure with three sides, three angles, and three points. Triangles can be named by using three points in their correct sequence.
Lesson Plan
Curated OER

Properties of Triangles

For Teachers 4th - 8th
Learners explore the relationship between how big a side of a triangle is and how big its opposite angle is by creating triangles using an interactive website.
Lesson Plan
Curated OER

Similar Triangles

For Teachers 9th - 10th
Students differentiate between similar and congruent triangles. For this geometry lesson, students identify the missing side and angle of a triangle. They identify the different ratio and proportion of the sides of a triangle.
Lesson Plan
Curated OER

Isosceles Triangles

For Teachers 9th - 10th
Students identify the properties of an isosceles triangle. In this geometry lesson plan, students find the midpoint, median and angle bisector of a triangle. They construct angle bisectors and measure missing angles.
Lesson Plan
Curated OER

Areeas of Parallelograms and Triangles

For Teachers 12th
Twelfth graders are able to deduce the area of polygons by using several methods such as coordinate method. They are able to apply the area of polygons to real life situations. Students apply the Pythagorean Theorem in problem solving...
Worksheet
Curated OER

Multiplying a Polynomial by a Monomial

For Students 9th - 11th
In this multiplying polynomials worksheet, students solve and complete 13 different problems that include monomials. First, they use the distributive property to multiply a polynomial by a monomial. Then, students find each product and...
Lesson Plan
Curated OER

Finding The Center Mass of a Triangle

For Teachers 9th - 10th
Students calculate the center mass of a triangle. In this geometry lesson, students use the median to find the center mass. They discuss the different characteristics of triangles and their center of mass.
Lesson Plan
Curated OER

Acute Triangles

For Teachers 4th - 8th
Learners study acute triangles. They measure angles using a protractor, then classify the triangles as either right, obtuse, or acute. Everyone creates a design for a Navajo rug using only acute triangles.

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