Lesson Plan
Illustrative Mathematics

What is a Trapezoid? (Part 2)

For Teachers 4th - 6th Standards
This collaborative activity investigates the meaning of a trapezoid and a parallelogram. It begins by presenting two different definitions of a trapezoid. Learners are to reason abstractly the difference between the two definitions and...
Lesson Plan
Curated OER

Measurement

For Teachers 7th
Seventh graders measure surface area. In this geometry lesson, 7th graders find the surface area of various geometrical shapes. Using a computer program, students compute the area of 2-D and 3-D shapes.  Students use...
Interactive
Curated OER

Shapes and Angles

For Students 4th
Are your geometry whizzes learning about angles and shapes? This online worksheet gives 10 multiple choice questions based on images and word problems. Concepts include deducting angle degree, classifying shapes, and identifying angle...
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...
Lesson Plan
Alabama Learning Exchange

Polygons-Changing Area Versus Changing Perimeter

For Teachers 5th - 8th Standards
Investigate the area and perimeter of polygons in this geometry lesson. Young geometers use grid paper to draw a quadrilateral and calculate its area and perimeter. They also read The Greedy Triangle to identify the changing shape of...
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...
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

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:...
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
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.
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...
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....
Printables
K-5 Math Teaching Resources

Polygon Sort Sheet

For Teachers K - 4th Standards
What makes a polygon a polygon and how many different types are there? Invite your scholars to learn and discuss that question with this polygon sort sheet.  Learners cut out each polygon and sort them by their different...
PPT
Curated OER

The Allied Victory

For Teachers 8th - 10th
Key events that shaped the outcome of WWII are outlined in this well put together presentation. Easy to follow and set up in chronological order, Tenth graders will learn about the North African Campaign, Battle for Stalingrad, Invasion...
Lesson Plan
Curated OER

Circles to Spheres

For Teachers K - 3rd
Students investigate circles and spheres. In this space shapes lesson, students compare and contrast two-dimensional and three-dimensional shapes. Students investigate the relationship between plane and space shapes.
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, learners put words into the word shapes above and below the center line. Students put 16 words into the word shapes on 3 pages.
Worksheet
Curated OER

Fun with Word Shapes

For Students 1st - 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.
Worksheet
Curated OER

Shapes Word Search

For Students 4th - 7th
In this shapes word search activity, students use their problem solving skills to unscramble 10 words and then locate and identify them in the word puzzle.
Worksheet
Curated OER

Learning Colors and Shapes

For Students 2nd - 3rd
In this colors and shapes activity, students follow the directions to color each of the six shapes in a design the correct color.
Worksheet
Curated OER

Fun with Word Shapes

For Students 1st - 3rd
In this word shapes worksheet, learners 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

Shapes

For Teachers 2nd - 4th
Discuss the properties of 2D and 3D shapes in order to help learners understand the concept. Learners will participate in an interactive whiteboard lesson to develop understanding of 2D and 3D shapes.
Worksheet
Curated OER

Fun with Word Shapes

For Students 1st - 3rd
In this word shapes worksheet, students plug the words into the word shapes that fit above and below the center line. Students complete 3 pages with 16 words each.

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