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Showing Results for triangles

Classifying figures by features is a fundamental geometry skill. Use this lesson plan to teach your students how to categorize triangles by internal angle types. 

Classifying Triangles by Internal Angles

This hands-on lesson will get students thinking and talking about how the numbers in fact families are related. Use alone or with the lesson plan **Fact Family Trees.**

Fact Family Triangles

Students will work hard to build shapes with straws in this hands-on lesson about the defining attributes of triangles. Use alone or with **Know Your Shapes.**

Triangle Time

2D shapes are all around us! In this lesson students will explore the properties of four different shapes—triangles, circles, rectangles, and squares! They will learn that they can find these shapes anywhere in the world around us.


Finding All of the Flat Shapes

You'll see angles from every angle! Students will describe and compare different angles they see in everyday situations. Use this lesson on its own or use it as support to the lesson Classifying Triangles by Internal Angles.

Describing Angles

Practice subtraction with art! Help early learners grasp the concept of "taking away" using drawings. This lesson helps students work toward subtraction with numerals, and the mastery of simple shapes.

Art Subtraction

Sorting takes on a new challenge for students in this activity which engages their critical thinking skills. As students determine defining attributes, they’ll figure out what makes a shape a shape!

Shape Sort

It’s magic! In this lesson, students will “magically” move shapes together to form new shapes. Clay and toothpicks equal hands-on fun! Tangram challenges are provided for those students who need that little extra challenge.

Magical Movement

Geometry meets data in this fun lesson! Students will build a design using pattern blocks and then graph the number of each shape used. This scaffolded EL lesson can be used alone or alongside **Graphing Colored Counters.**

Graph My Design

In this lesson, your students will become familiar with shapes by identifying them in real life. Your students will love identifying how many sides shapes have by drawing and counting them!

Know Your Shapes!

Students will love composing and decomposing two-dimensional shapes using tangram puzzle pieces. Use this plan alone or to frontload key vocabulary and concepts taught in the lesson plan **Know Your Shapes.**

Composing Shapes

Adding fractions with unlike denominators just doesn't work like it does when the denominators are the same. Let's make it work! Students will add fractions with unlike denominators with sums between one and two.

Make It Work! Adding Fractions with Unlike Denominators

Your students will have a blast thinking about polygons and making these paintings inspired by Wassily Kandinsky!


Kandinsky Shapes

Your students will learn when to use less than and greater than and how to differentiate the two symbols in this lesson. They will have fun playing the role of the Less Than and Greater Than alligators!

Less Than or Greater Than Alligators

Make a math mystery! In this lesson, help your students understand the relationship between addition and subtraction and how a missing addend word problem is represented with a number sentence.

Mystery Addends: Representing Word Problems

This lesson helps students understand the difference between polygons. It focuses on the root words of these terms to help students make connections to their prior knowledge, making it especially beneficial for ESLs.

Jumping Into Geometry!

Learning about shapes isn't "square" with this lesson! Students will learn what makes up a shape and learn to draw them themselves which will turn into a fun hands-on clay molding activity.

Shape Identification: Bake 'N Buy

Teach your students about the shapes that make up the world around them with this lesson that has them identify shapes in the classroom and in drawn scenes.

The Shape of Me and Other Stuff

This snazzy lesson features Pete the Cat and His Four Groovy Buttons by Eric Litwin. Your students will love practicing their classification skills while playing with buttons of their own.


Button Classification

In this lesson, your students will collect and organize data to make a beautiful bar graph! They will also practice analyzing the graphs with the information they have.

Collect, Organize, Display, Analyze

Animals and spots are used to make multiplication interesting! In this lesson, students will practice multiplying one digit numbers.

Animal Spots: Multiplication Practice

Let's get clapping! Help students extend their knowledge of patterns by using rhythm. After making musical patterns, students will translate the patterns into shape patterns. 

Rhythm Patterns

Show your class how combining two objects can create a new object in this hands-on science lesson. Students will learn why breaking apart an object doesn't change its mass.

All About Matter: Chemical vs. Physical Changes

Students will get hands-on practice by building shapes with pipe cleaners in this lesson all about the defining attributes of rectangles. Use as a stand alone lesson or with the **Shapes for Kindergarten** lesson plan.

All About Rectangles

Teach your students to predict and explain features of scaled regular shapes.

Shapes to Scale

Identifying shapes and colors will come easily to students after listening to songs, playing bingo, and coloring a worksheet!

Shapes for Kindergarten!

Stretch student understanding of patterns, shapes, and symmetry with this fun mandala art project!

Shape Mandalas

What's in the bag? This fun math lesson involves using defining attributes as clues to draw conclusions. Young learners will have a great time making guesses about different objects and creating their own shape riddles.

Shape Detectives: What's in the Bag?

Your students will love classifying shapes into groups with this simple coloring and graphing lesson. It includes a bunch of fun worksheets and a song to keep young mathematicians engaged.


Classify, Count, and Graph with Shapes

Everyone loves pizza! Introduce the concept of fractions as equal shares in a familiar context. Use alone or with **Halves as Equal Shares.**

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