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3rd grade Triangle Building

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Cindyx3

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Triangle Building 3rd grade

Running head: Lesson on Building with Triangles

Triangle Building
Topic: Mathematics
Cindy DiMaggio
Manhattanville College
School of Education
EDU 5107
Professor: Monique Reilly
Summer 2
2008

Cindy Dimaggio Summer 2008
EDU 5107 Prof. Reilly Triangle Lesson plan

Title: Triangle Building

Overview: What can you build with Triangles? The Students will explore ways of building different basic shapes from the triangles on the worksheet. They will learn various types of triangles and investigate three-dimensional shapes constructed from triangles.

Goals: To have children explore ways to build different shapes from triangles. Explore three-dimensional shapes using triangles. Introduce different types of triangles to students.

Objectives:
Students will be able to:
• Explore ways of building different basic shapes from triangles
• Investigate three dimensional shapes constructed from triangles
• Cut out and investigate what things in the world are shaped liked triangles by making a triangle book
• Cut out and Identify different types of triangles by making another triangle book

Intended Audience: Third grade

New York State Learning Standards:

1. Investigate, describe, and reason about the results of subdividing, combining and transforming shapes.
2. Classify two and three-dimensional shapes according to the properties and develop classes of shapes such as triangles, squares, parallelograms, diamonds, pyramids, and blocks
3. Identify, compare and analyze attributes of two and three-dimensional shapes and develop vocabulary to describe the attributes.
4. Build and draw geometric objects.
5. Identify different types of triangles and what things around them are triangles shaped
6. Use relationships to analyze mathematical situations.
7. Draw conclusions about mathematics

Prerequisite Knowledge: Children must have prior knowledge of shapes, sizes and how to manipulate them. They must identify with equal lateral triangles and other types of triangles.

Materials:
• Scissors
• Glue
• Masking tape
• Duplicated examples of a square, a triangle, and a parallelogram
• Two sheets of triangles
• Two sheets to build triangles books
• crayons

Procedures:
I would start the class of by reviewing triangles. You can start by asking questions such as:
• What is a triangle?
• How can we classify or identify triangles based on their sides?
• How can we classify or identify triangles based on their angles?
• If you use different quadrilaterals, how can you cut or fold paper to create triangles?
• Are there different types of triangles?
• What are some of the tricks we can use to remember the different types of triangles?

I would then begin by explaining to the students that for our first activity we will be using equilateral triangles.
• I will distribute two triangles activity sheets.
• Next I will have students cut out two triangles from the bottom of the sheet.
• Then using models of the square, triangle, and parallelogram to encourage students to make various shapes. Ask them to make new shapes with the two triangles and have them glue the new shapes onto their sheets.
• In a class discussion encourage students to share at least one important thing they noticed about one of the new shapes. Examples are, Likenesses, differences; where it could be seen in the classroom, playground, school, or at home and so on.
• From here I will form groups and have child work on their triangle sheets.
• I will then show and demonstrate three-dimensional shapes that you can make with triangles to the class. Examples: pyramids and boxes
• I will circulate the class and help each group carry out the task at hand. When finished I will hand out the second triangle sheet and start the children on making their three-dimensional shapes with the triangles from the second sheet. When children are finished we will share our results with the class. Groups will explain what shapes they came up with and what three dimensional shapes they made.
• Then if time allows we will work on a reinforcement lesson on triangles and complete triangles books in class or for homework.

Differentiation: I will group children according to their abilities. I will have stronger students working with weaker students to help them understand the task at hand. I will do this without letting the children know that it’s how I’m grouping them. (Pull names out of a hat) I will be the only one who knows how I separated the children.

Assignments: Children are to complete two activity sheets in class and work on triangle books either if time allows in class or as reinforcement for homework.

Assessments: The assessments will be based on observation and recording the process of each child’s individual work

Extensions: I will read and discuss The Greedy Triangle, by Marilyn Burns to the class. I will then go on to continue with reinforcing the various shapes we can build with triangles. The different types of triangles that can be used and use them to build other triangles and various shapes. I will use an Internet tool called Patch Tool, so that children can manipulate shapes on the screen to seek and build various shapes and designs with triangles.

Reflective Questions:
• What did you learn about triangles today?
• What did you like doing best? Making different shapes or Making three-dimensional shapes and why?
• What else did you learn about shapes today?
• Can any one think of different ways we can learn about triangles and shapes?
• What can you name in the classroom that has a triangular shape or has a shape you can make from triangles?
• What other activities would you like to do with triangles and shapes?
• Did you learn and understand the ways we can make different pictures and shapes with triangles?
• What is the best thing you learned in class today?
• How can I make learning about triangles and shapes more interesting or geared towards what the children are interested in?
• Did we reach our goals and objectives today?

References

Books:

Braddon,K., Hall, N., & Taylor, D. (1993)
Math Through Children’s Literature, Making the NCTM Standards Come Alive,
Greenwood Village, CO: Teacher Ideas Press

Websites:
http://www.amazon.com/gp/product/0545042208/ref=s9subs_c4_img2-rfc_g1?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-3&pf_rd_r=1DK5VASFAVJXKKMWBTSX&pf_rd_t=101&pf_rd_p=278240801&pf_rd_i=507846

http://illuminations.nctm.org/ActivityDetail.aspx?ID=27

http://illuminations.nctm.org/LessonDetail.aspx?ID=U93

http://illuminations.nctm.org/LessonDetail.aspx?ID=L233

http://members.EnchantedLearning.com/books/shapes/triangle/book.shtml?p

http://members.enchantedlearning.com/books/shapes/triangles/book.shtml?p

http://my.nctm.org/ebusiness/productcatalog/product.aspx?ID=12174

http://my.nctm.org/eresources/journal_home.asp?journal_id=4

http://thereflectiveteacher.wordpress.com/2007/05/24/reflection-questions/