Lesson Plan
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Illustrative Mathematics

What Shape Am I?

For Teachers 3rd - 5th Standards
Sharpen your pencil and grab a ruler, it's time to draw some quadrilaterals! Given the definition of a parallelogram, rectangle, and rhombus, learners draw examples and nonexamples of each figure. The three definitions are...
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
National Security Agency

Classifying Triangles

For Teachers 4th - 8th Standards
Building on young mathematicians' prior knowledge of three-sided shapes, this lesson series explores the defining characteristics of different types of triangles. Starting with a shared reading of the children's book The Greedy...
Lesson Plan
Illustrative Mathematics

What is a Trapezoid? (Part 1)

For Teachers 3rd - 5th Standards
Challenge your class to construct a definition for trapezoids. Looking at four examples and four non-examples, students individually create definitions and use them to classify an unknown shape. Allow for small group and whole-class...
Lesson Plan
Digging Into Math

Classifying Triangles

For Teachers 4th - 8th Standards
Young mathematicians explore the world of three-sided shapes in this lesson on the different types of triangles. Starting with a general introduction to classification using Venn diagrams, children learn how to categorize triangles...
Worksheet
Curated OER

Classify Quadrilaterals

For Students 3rd - 4th
In this recognizing geometric shapes worksheet, students identify quadrilaterals and their terms. Students solve 13 problems.
Lesson Plan
Curated OER

Geometry Practice: Classifying Solids #2

For Teachers 7th - 9th
For this solids worksheet, students identify the characteristics of solids. They name solids and determine the number of faces. This three-page worksheet contains seventeen problems. Answers are listed on the last page.
Worksheet
Curated OER

Classifying Shapes

For Students 3rd - 4th
In 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...
Worksheet
Curated OER

Classifying Angles Online

For Students 5th - 6th
In this online classifying angles worksheet, students work out the answers to sixteen math questions and fill in the boxes with their answers. Students check their answers online as they go and the computer calculates the overall score...
Worksheet
Curated OER

Classifying Objects into Group

For Students Pre-K - K
Classifying and sorting are great skills all kids need to know. They cut out each of the six images provided, then label each of two boxes. They glue the images in the appropriate box. Answers are provided. 
Worksheet
Print and Practice

Classifying Worksheet

For Students Pre-K - 2nd
For this classifying shapes worksheet, students study the first shape in 5 rows of shapes. Students then color in the shape on each row that matches the initial shape.
Lesson Plan
Illustrative Mathematics

Are These Right?

For Teachers 3rd - 5th Standards
Is that a right triangle or a wrong triangle? Young mathematicians look at eleven different shapes and use a measuring tool of their choice to determine which triangles have right angles. Consider cutting out sets of the shapes to...
Worksheet
Curated OER

Classify Quadrilaterals

For Students 4th - 6th
Here is a quadrilateral instructional activity in which learners choose words that describe shapes, words to complete sentences that describe shapes. A reference web site is given for additional activities. 
Worksheet
Curated OER

Classifying and Sorting Shapes 3

For Students 1st - 2nd
In this early childhood problem solving worksheet, students sort and classify shapes as they respond to 3 short answer questions regarding characteristics of shapes. Students also respond to 1 test prep question.
Worksheet
Curated OER

Classifying and Sorting Shapes

For Students 1st - 2nd
For this early childhood problem solving worksheet, students sort and classify shapes as they respond to 4 short answer questions regarding characteristics of shapes.
Lesson Plan
1
1
Illustrative Mathematics

The Geometry of Letters

For Teachers 3rd - 5th Standards
Use the alphabet as a tool for teaching your class about geometric figures. Break apart capital letters into line segments and arcs. Classify angles as right, acute, or obtuse. Identify parallel and perpendicular lines. An excellent...
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.
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...
Worksheet
Curated OER

Describe and Classify 2-D Shapes

For Students 1st - 3rd
In this 2-D shapes worksheet, students match a set of descriptions to shapes given. A reference website for additional resources is given.
Worksheet
Curated OER

Shapes

For Students 1st - 2nd
For this shapes worksheet, students identify shapes according to sentences that describe them. Students identify 8 shapes, but have 14 to choose from.
Worksheet
Print and Practice

Classifying Worksheet

For Students 2nd
In this shapes activity, 2nd graders color the shape in each row that is different from the rest. Students color shapes for 5 rows with different shapes in them.
Worksheet
Math Drills

Classifying Prisms and Pyramids

For Students 2nd - 5th Standards
Young geometers identify prisms and pyramids based on the number of edges they have. Answers vary from hexagonal and rectangular prisms to pentagonal and octagonal pyramids. 
Lesson Plan
Illustrative Mathematics

Lines of Symmetry for Triangles

For Teachers 3rd - 5th Standards
What can symmetry tell us about triangles? After looking at four examples, learners will come to realize that lines of symmetry are different for equilateral, isosceles, and scalene triangles. Use this guided practice activity as an...
Worksheet
Curated OER

Classifying Solids

For Students 9th - 10th
In this geometry activity, students classify polygons based on their sides and shape. There are 16 shapes to be identified with an answer key.