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Lesson Plan
Curated OER

Identify, Sort, Classify

For Teachers K
Students identify, sort, and classify. In this kindergarten math activity, students explore visual examples of sorting with 1 or more attributes. Students also practice solving problems that their instructors model.
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Lesson Plan
Curated OER

Circles, Rectangles, Squares, Triangles

For Teachers K
Students identify, compare and classify the various shapes. For this shapes lesson, students listen to descriptions of shapes with words such as sides, angles, congruent, and parallel. Students then give the teacher examples of shapes...
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Lesson Plan
Curated OER

Classifying Quadrilaterals

For Teachers 4th - 8th
Learners cut out three different shapes and put them in the correct categories of parallelograms, trapezoids, and trapeziums. In this parallelogram lesson plan, students explain the sums of the angles of a triangle and a quadrilateral.
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Worksheet
Curated OER

Special Segments is a Triangle

For Students 10th
In this geometry worksheet, 10th graders examine the special segments that occur in a triangle.  The three page worksheet contains twenty-five problems.  Answers are not included. 
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Lesson Plan
Curated OER

The Quirky Quadrilateral

For Teachers 4th
Fourth graders identify and classify different triangles and quadrilaterals. Then they demonstrate an understanding of plane and solid geometric objects and use this knowledge to show relationships and solve specific problems. Students...
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Worksheet
Curated OER

Classifying Triangles

For Students 10th
In this classifying triangles worksheet, 10th graders solve and complete 11 different types of problems. First, they state whether each segment shown is an altitude, median, or neither. Then, students solve for x and find the requested...
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Lesson Plan
Beacon Learning Center

The Fun Polygon

For Teachers 4th - 6th Standards
Junior geometers use hands-on manipulatives to explore and describe the properties and attributes of a fundamental polygon, the triangle. They learn different kinds of angles and their measurements. This well-written lesson plan provides...
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Worksheet
Mt. San Antonio Collage

Postulates, Angles, and Their Relationships

For Students 8th - 11th Standards
More than a worksheet, learners go through geometry topics example by example on the nicely organized handout. From postulates to classifying angles, there are rules and examples provided for each topic. The ten pages of problems provide...
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Activity
PBS

Terrific Trees

For Teachers 3rd - 8th
Engage in a shady activity to practice measurement techniques. Classes venture outside to collect measurements of various trees, using different strategies to measure the height, trunk circumference, width, and crown size. Then they...
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Lesson Plan
Curated OER

Geometry and Quilting

For Teachers 4th - 5th
Students create a quilt square for a class quilt using at least three, two-dimensional geometric figures. They research and write a brief description of at least two different quilt patterns that they find. Pupils discuss that quilts are...
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Lesson Plan
Curated OER

Try An Angle

For Teachers 5th
Fifth graders classify the different triangles by sides and angles. They discover how many different ways they can arrange 2, 3, 4 ...7 tangram pieces to create triangles. They classify and label the six triangles on their pattern sheet.
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Lesson Plan
Ohio Department of Education

Describing and Creating Plane Figures - Grade One

For Teachers K - 2nd Standards
Young mathematicians draw, create, and describe different shapes using triangles. They discuss attributes of the original and created shapes. Pupils classify the created shapes and draw and write in mathematics journals to communicate...
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Worksheet
Curated OER

Informal Geometry

For Students 8th - 12th
Middle and high schoolers solve and complete 29 various types of problems. First, they match each name with its correct formula. Then, students find the length of the missing side and the distance between the two points given. In...
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Lesson Plan
Virginia Department of Education

Exploring Quadrilaterals

For Teachers 6th
Sort this resource into the Use pile. Scholars investigate attributes of quadrilaterals and then use the results to sort and classify the shapes labeling each figure with their properties to justify the classifications.
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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...
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Unit Plan
Curated OER

Connecting Algebra and Geometry Through Coordinates

For Teachers 9th - 10th Standards
This unit on connecting algebra and geometry covers a number of topics including worksheets on the distance formula, finding the perimeter and area of polynomials, the slope formula, parallel and perpendicular lines, parallelograms,...
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Lesson Plan
Curated OER

Fractals

For Teachers 10th - Higher Ed
Pupils explore the concept of fractals. In this fractal lesson plan, students use applets to explore Koch's Snowflake, Sierpinski's Triangle, and other fractals. Pupils develop these concepts through exploration and teacher guided...
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Lesson Plan
Curated OER

Classifying Polygons

For Teachers 7th
Seventh graders participate in a polygon hunt.  For this polygon lesson, 7th graders examine how polygons are alike and different.  Students create a Venn diagram and label the sorting circles.  Students work in cooperative groups to...
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Worksheet
Curated OER

Classifying Shapes

For Students 3rd - 4th
For this math worksheet, students investigate simple geometric shapes in the world around them. Students examine 3 detailed pictures which contain many shapes, then answer 7 questions about the picture. Then students complete a rebus...
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Worksheet
Curated OER

Points of Concurrency for Triangles

For Students 10th
In this geometry worksheet, 10th graders solve a  problem involving the possible lengths for the third side of a triangle given two sides and determine where the point of concurrency lies in relation to the triangle. The one page...
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Lesson Plan
Center for Innovation in Mathematics Teaching

Vectors

For Teachers 9th - 12th Standards
Investigate vectors and learn how to use them. Explore why size and direction, as well as knowing speed and distance, are important components of the vector problems you are trying to solve. This is an extensive lesson which includes six...
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Worksheet
DK Publishing

A Burning Matter

For Students 5th
The process of fire requires oxygen, heat, and fuel. Take one of those away, and fire ceases to exist. That's the idea behind this worksheet which portrays a candle burning inside an upside down jar. Pupils answer a couple of questions...
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Lesson Plan
Curated OER

Shapes in Our World

For Teachers 1st - 3rd
Help your students explore shapes. They classify shapes and identify them in their everyday world. Plane shapes are explored, and they classify and identify the plane shapes.
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Lesson Plan
Curated OER

Tetrahedron Kites

For Teachers 6th - 7th
Let's go fly a kite! Discuss the concept of two-dimensional and three-dimensional objects with your math class. They examine a triangle and discuss the face, vertices, edges, and angles. Then they build their own Tetrahedral Kites and...

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