Final Construction and the Building Inspection

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Objective

SWBAT use measurement skills and knowledge of rectangles to add pieces to an irregular 3 dimensional roof and will be visited by the building inspector!

Big Idea

Rectangles are an important part of many 3 dimensional solids.

Lesson Author

Jennifer Valentine

Tucson, AZ

Grade Level

Third grade

Subjects

Math

Geometry

Standards

3.MD.C.5

Recognize area as an attribute of plane figures and understand concepts of area measurement.

3.G.A.1

Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared attributes can define a larger category (e.g., quadrilaterals). Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories.

MP1

Make sense of problems and persevere in solving them.

MP4

Model with mathematics.

MP5

Use appropriate tools strategically.

MP6

Attend to precision.

Opener

5 minutes

Most students will be almost done and can start getting ready for their visit from the building inspector. I write these questions on the board so that they know that the building inspector can ask any of the following questions. Then I either visit them in person with my clipboard and an imaginary checklist or I may call on students to present the information in front of the zoning board (the class).

What shapes are in your building?

What is this 3 dimensional solid? (point)

What shapes make up this (point) 3 dimensional solid?

What shapes can that (name shape) be decomposed into?

What is your building's purpose?

Do you have a fire escape?

Make sure it is wheelchair accessible. Show me where you will build the ramp.

What is the maximum occupancy of your building?

What features do you have in your building that will help you conserve energy?

Construction Activity

45 minutes

Making Discoveries

Internal Support for a Cylinder.mp4

Students who need to finish up on their buildings do so while the others write down notes for the building inspector and practice asking each other the questions. They may also be recruited (by me or by other students) to assist with construction.

I walk around and confer with students. Here I am asking a student about how she will construct her roof and we talk about Applying Area to Building the Roof.

The building inspector (me) starts to talk to students whose buildings are complete. In doing so I heard this student Explains Her Thinking and critique her own reasoning!

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