The Greedy Triangle

Written by Marilyn Burns

Mrs. Campbell First Grade

• The book The Greedy Triangle

• Crayons

• Shape Book

• Pencils

• Geoboard

• Smartboard

• Whiteboard

This story is about a Triangle who wants to be more than just a Triangle. It believes that more angles and corners will make life better. So the Triangle visits the character the Shapeshifter. The Shapeshifter changes the Triangle into many different shapes.

Do you think some shapes are better than others and why?

How will the Shapeshifter change the Triangle into different shapes?

What shapes do you think the Triangle will turn into?

Sides- Sides are the outside lines of a shape.

Vocabulary

Quadrilateral

Pentagon

Hexagon

A quadrilateral has four sides and four corners. A baseball diamond is the shape of a quadrilateral.

A pentagon has five sides and five corners. Asoccer ball is made up of tiny pentagon shapes.

A hexagon has six sides and six corners. ABee hive cell is the shape of a hexagon.

The next set of vocabulary words I will introduceare quadrilateral, pentagon, and hexagon.

Heptagon

Octagon

Nonagon

Decagon

Vocabulary

A hexagon is a seven sided shape with seven corners. A flower can be in the shape of a hexagon.

An octagon is an eight sided shape with eight corners. A stop sign is the shape of an octagon.

A nonagon is a nine sided shape with ninecorners. The top of a building can be in the shape of a nonagon.

A decagon is a ten sided shape with tencorners. A mirror can be in the shape of a decagon.

Name of the shape Picture of the shape

Number of sides Number of corners

Triangle

Quadrilateral

Pentagon

Hexagon

3 3

4 4

5 5

6 6

CLICKLet’s have some fun reviewing our shapes.

Geoboard Fun!

What is the lesson the triangle learned?

What is the lesson you learned?

Let’s have some fun watching a video about shapes and sizes.CLICK

You are going to become a shape detective. Your new assignment is to go home and cut out five pictures of different shapes from magazines, newspapers, food boxes and construction paper. You will bring the pictures to school and create your very own shape book. Have fun being a shape detective!

Points 3 2 1 Total

Before Reading Student will participate in brainstorming, making predictions, drawing the shapes, and listen carefully to the new vocabulary.

Student will partially participate in brainstorming, making predictions, drawing the shapes, and listen to the new vocabulary.

Student will not brainstorm, make predictions, draw the shapes and listen to the new vocabulary.

During Reading Listens carefully to the story and participates in writing the numbers on their white board.

Partially listens to the story and write some of the numbers on their whiteboard.

Will not listen and write any of the numbers on the whiteboard.

After Reading Creates all five shapes on their geoboard.

Creates three shapes on their geoboard.

Creates two or less shapes on their geoboard.

Beyond Reading Create a shape book with five pictures and label all of the pictures.

Create a shape book with three pictures and label the pictures.

Create a shape book with two or less shapes and label the pictures.

Marilyn Burns

Spaghetti and Meatballs for All

Amanda Bean’s Amazing Dream

Wonderful Article Written By Marilyn Burns: Connecting Writing and Math

Other Marilyn Burns Books

Cats Add Up!

Burns, M. (1994). The Greedy Triangle. New York: Scholastic.

Text

http://www.mathsolutions.com/documents/2004_Writing_in_Math.pdf

Cyber Lesson- Slide 4: I will have the students brainstorm a list of familiar geometric shapes on the smartboard. Then I will have the students draw pictures of the shapes they predict the triangle will turn into on their own whiteboards. Next I will introduce vocabulary words that the students will hear throughout the story.

Cyber Lesson- Slide 4: Then after I introduce these vocabulary words I will have the students find an object in the classroom that is a triangle. Then I will ask the students to point to the sides and angles of the object.

Cyber Lesson- Slide 6: To not overwhelm the students with challenging vocabulary I will address new words when they are mentioned in the story.Cyber Lesson- Slide 7: While reading the book The Greedy Triangle I will stop periodically to have the students predict how many sides and angles each new shape will have. Then they will record their answers on their own whiteboard. Lastly, I will confirm their predictions on the smartboard by having the correct answer appear on my chart.

Cyber Lesson- Slide 8: When I finish reading the story the students will return to their seats and get a geoboard. They will be creating the different shapes from the story The Greedy Triangle. They will be making the same shapes as Mrs. Campbell makes on her geoboard. To check their work I will encourage the students to count the sides and angles of their shapes. The students will be making these shapes: triangle, quadrilateral, pentagon, and hexagon.

Cyber Lesson- Slide 8: When the students have finished making all of the shapes I will redirect their attention towards the theme of being greedy. I will remind them that a three sided shape is just as important as a shape with more than three sides.

My school does not have computer time for first graders however, there is a portable smartboard. I will be using the smartboard to teach this cyber lesson in a whole group setting over the course of a week.