Education Standards
OSPI Other Functions Instructional Task: Paper Mache Globe
Overview
This resource was created by the Washington Office of Superintendent of Public Instruction.
Task
OSPI Other Functions Instructional Task B
Other Functions; A-REI.2, Claim 1, Claim 3E
Paper Mache Globe
Josef is making a paper-mache globe for his geography class. He knows the radius of the balloon he is using is 14 inches. He wants to find the surface area of the globe by using the formula:
, where is the radius and is the surface area of the globe.
- Determine the surface area of the globe using the given equation. Use Show your work.
Natasha thinks Josef’s globe is too small. She wants to increase the radius by when she makes hers. She claims she will have more than twice the surface area of Josef’s globe.
- Is Natasha’s claim valid? Support your reasoning with numbers and words.
Rubric
Rubric
Question Number | Standard/Claim | Description |
B | A-REI.2/Claim 1 A-REI.2Claim 3E | A 2-point response demonstrates reasonable understanding of the standard and claims by doing all the following:
States using numbers and words the radius is squared in the equation and so the surface area of Natasha’s globe would be more than twice Josef’s OR calculates the surface areas of both and justifies the claim with number and words. |
A 1-point response demonstrates partial understanding of the standard and claims by doing one of the following:
States using numbers and words the radius is squared in the equation and so the surface area of Natasha’s globe would be more than twice Josef’s OR calculates the surface areas of both and justifies the claim with number and words. | ||
A 0-point response demonstrates almost no understanding of the standard and claims. |
OSPI Other Functions Instructional Exemplar
OSPI Other Functions Instructional Exemplar B
Josef is making a paper-mache globe for his geography class. He knows the radius of the balloon he is using is 14 inches. He wants to find the surface area of the globe by using the formula:
, where is the radius and is the surface area of the globe.
- Determine the surface area of the globe using the given equation. Use Show your work.
Natasha thinks Josef’s globe is too small. She wants to increase the radius by when she makes hers. She claims she will have more than twice the surface area of Josef’s globe.
- Is Natasha’s claim valid? Support your reasoning with numbers and words.
Answer
2464 square inches =
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