Lesson Plan
Curated OER

Identifying and Classifying Solid Figures

For Teachers 2nd - 3rd
Students identify and classify solid geometric figures. In this geometry lesson, students bring in objects that look like solid shapes and identify their attributes. Students identify the number of surfaces and faces on each figure.
Lesson Plan
Exploratorium

Exploring a Complex Space-Filling Shape

For Teachers 6th - 8th
Middle schoolers build a three-dimensional 12-pointed star as a geometric exercise. The shape is quite-difficult to construct. Luckily there is an excellent template that learners cut out, then use to make their pyramid. The second part...
Worksheet
Curated OER

Similar Shapes

For Students K - 1st Standards
In geometry, similar and congruent shapes are often confused. Shapes that are similar are the same shape, but a different size. This activity gives young learners some practice in identifying similar shapes. There are five polygons...
Worksheet
Kuta Software

Reflections of Shapes

For Students 7th - 10th Standards
In this reflection of shapes learning exercise, learners graph images on a coordinate plane. They reflect the image and sketch it on the graph. They write a rule to describe the transformation. This four-page learning exercise contains...
Lesson Plan
Curated OER

Poly-Mania

For Teachers 9th - 12th
This hands-on activity takes young geometers on a tour of 2D polygons and 3D polyhedrons. After exploring different web resources and discussing geometric shapes, small groups construct models of polyhedrons using bendable straws. Note:...
Worksheet
Curated OER

Symmetry Worksheet

For Students 7th - 10th
This resource offers a series of hands-on activities in which learners sketch and construct symmetrical origami, paper dolls, snowflakes, and polyhedra while adhering to specific requirements. These activities ask class members to...
Assessment
Los Angeles County Office of Education

Assessment for the California Mathematics Standards Grade 2

For Students 2nd Standards
Test scholars mathematic skills with an assessment addressing addition, subtraction, multiplication, place value, measurement, geometric shapes, expanded notation; and their ability to compare numbers, write number...
Activity
Denton Independent School District

Pieces to the Puzzle Fraction Project

For Teachers 4th - 6th Standards
Four polygons each have a fraction with unlike denominators printed on them. Creative math minds select several shapes to create a design with and then write and solve a math problem involving the addition of all of the fractions...
Lesson Plan
Curated OER

Building Big and Strong

For Teachers 6th - 9th
Middle and high schoolers explore the concepts of architectural rigidity. They analyze a variety of polygons, and explain why some shapes add more strength to structures than others. The PBS video, "Building Big," is utilized in this plan.
Lesson Plan
Statistics Education Web

It Creeps. It Crawls. Watch Out For The Blob!

For Students 9th - 12th Standards
How do you find the area of an irregular shape? Class members calculate the area of an irregular shape by finding the area of a random sampling of the shape. Individuals then utilize a confidence interval to improve accuracy and use a...
Activity
Noyce Foundation

Lyle's Triangles

For Students K - 12th Standards
Try five problems on triangles. Levels A and B focus on shapes that can be created from right triangles. Level C touches upon the relationship between the area of a six-pointed star and the area of each triangle of which it is composed....
Unit Plan
Arizona Department of Education

Area and Perimeter of Regular and Irregular Polygons

For Teachers 3rd - 6th Standards
Extend young mathematicians' understanding of area with a geometry lesson on trapezoids. Building on their prior knowledge of rectangles and triangles, students learn how to calculate the area of trapezoids and other...
Lesson Plan
Illustrative Mathematics

Finding Areas of Polygons, Variation 1

For Teachers 5th - 9th Standards
An exercise in finding the area of polygons by decomposing into triangles and composing into rectangles is the focus of this resource. Make several copies of the worksheet for each participant. Ask learners to use colored pencils to...
Lesson Plan
Shodor Education Foundation

Visual Patterns in Tessellations

For Teachers 7th - 10th Standards
Geometers explore the concept of tessellations. They use a tessellation applet to manipulate shapes and design their own tessellation using the applet.
Assessment
CPALMS

2D Rotations of Triangles

For Students 9th - 12th Standards
Where does the line of rotation need to be to get a cone? Pupils respond to three questions involving rotating a right triangle about different lines. The scholars describe the solid created along with providing details about its...
Lesson Plan
Curated OER

Mirror, Mirror

For Teachers 5th - 6th
Geometry students use hinged mirrors to discover that the regular polygons are composed of triangles tessellating around a center point. They sketch triangles on paper models of the regular polygons having 3 to 10 sides and compute the...
Activity
101 Questions

Coffee Traveler

For Teachers 9th - 12th Standards
Investigate the volume of irregular figures in an inquiry-based exercise. Presented with an irregularly shaped box filled with water, learners must predict the level of water when it is tipped on its side. The class can divide...
Assessment
Mathed Up!

Volume of Prism

For Students 7th - 10th Standards
The area is essential to volume. As part of the review for the General Certificate of Secondary Education math assessment, a helpful video covers how to find the volume of several common 3-D figures. Pupils use the general volume formula...
Worksheet
Curated OER

Understanding Visual Fractions

For Students 3rd - 5th
Visualize fractions using segmented shapes. The five shapes here are each divided into equal parts, with some parts shaded. Mathematicians match the shapes to the fraction represented by the shaded region. This is a good way to introduce...
Worksheet
Curated OER

Understanding Visual Fractions

For Students 4th - 5th
Using fractions as their artistic guide, learners color in parts of five shape images. Each image is segmented based on the denominator, so scholars simply need to apply the numerator to know how much to color. None of these are mixed...
Organizer
Curated OER

Net (Triangular Pyramid)

For Students 3rd - 8th
In this 3-D folding objects worksheet, students cut out the model to fold and create a triangular pyramid. No instructions are included.
Worksheet
Curated OER

Fun with Word Shapes

For Students 2nd - 3rd
In this word shapes activity, students put words into the word shapes above and below the center line. Students put 16 words into the word shapes on 6 pages.
Worksheet
Curated OER

Fun with Word Shapes

For Students 2nd - 3rd
In this word shapes worksheet, students put words into the word shapes above and below the center line. Students put 16 words into the word shapes on 3 pages.
Lesson Plan
Curated OER

Marshmallow Geometry

For Teachers 3rd
Third graders create 2D and 3D shapes using marshmallows and toothpicks. In this geometry lesson plan, 3rd graders create their shapes and document the number of faces, edges, corners, angles, and sides. They share one shape and its...

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