Education Standards
OSPI Other Functions Instructional Task: Building a Swimming Pool
Overview
This resource was created by the Washington Office of Superintendent of Public Instruction.
Task
OSPI Other Functions Instructional Task C
Other Functions; Standards A-SSE.2, Claim 1; A-APR.1, Claim 1; A-CED.1, Claim 3E
Building a Swimming Pool
A family decided to build a swimming pool in their back yard. The area of the inner rectangle in the drawing represents the pool. The area around the pool will be a deck. The whole area is of the swimming pool and deck is represented by the larger rectangle.
- Determine the area of the larger rectangle that includes the pool and the deck. Write this in expanded form.
- Write an expression for the area of the deck. Show work. Combine like terms.
Jorge knows that the length of the pool is twice the width. He claims that the area of the deck will be about four times larger than the area of the pool.
- Determine the validity of Jorge’s claim that the area of the deck will be about four times larger than the area of the pool. Explain your reasoning using numbers and words.
Rubric
Rubric
Question Number | Standard/Claim | Description |
C | A-SSE.2/Claim 1 A-APR.1/Claim 1 A-CED.1/Claim 3E | A 3-point response demonstrates full and complete understanding of the standards and claims by doing all the following:
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A 2-point response demonstrates reasonable understanding of the standards and claims by doing two of the following:
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A 1-point response demonstrates partial understanding of the standards and claims by doing one of the following:
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A 0-point response demonstrates almost no understanding of the standards and claims. |
OSPI Other Functions Instructional Exemplar C
OSPI Other Functions Instructional Exemplar C
Other Functions; Standards A-SSE.2, Claim 1; A-APR.1, Claim 1; A-CED.1, Claim 3E
Building a Swimming Pool
A family decided to build a swimming pool in their back yard. The area of the inner rectangle in the drawing represents the pool. The area around the pool will be a deck. The whole area is of the swimming pool and deck is represented by the larger rectangle.
- Determine the area of the larger rectangle that includes the pool and the deck. Write this in expanded form.
- Write an expression for the area of the deck. Show work. Combine like terms.
Jorge knows that the length of the pool is twice the width. He claims that the area of the deck will be about four times larger than the area of the pool.
- Determine the validity of Jorge’s claim that the area of the deck will be about four times larger than the area of the pool. Explain your reasoning using numbers and words.
The area of the deck would be The area of the pool would be = .
The area of the deck is about 3 times the area of the pool. |