Task Teacher Guide
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Through This Assessment Opportunity…
Students will demonstrate the concepts and skills that they have developed through these contexts and learning experiences.
Intentionality…
The purpose of this assessment is for students to demonstrate their understanding of the following big ideas.
- The area of a rectangle can be determined by multiplying the length of its base by the length of its height;
- The area of a rectangle is used to determine the area formulas for other polygons;
- Using “base” and “height” rather than “length” and “width” can support student understanding when determining the area formulas for triangles and all quadrilaterals;
- A parallelogram is any quadrilateral with two sets of parallel sides;
- A rectangle is a parallelogram;
- Any triangle can be doubled to create a parallelogram;
- Congruent shapes have the same size and shape, but not necessarily the same orientation;
- Any parallelogram can be decomposed and recomposed to build a rectangle with the same area.
The independent assessment will allow students to demonstrate concepts and skills related to the following learning goals:
- I will calculate the area of a triangle;
- I will calculate the area of parallelogram;
- I will determine the dimensions of a triangle and a parallelogram when given the area; and,
- I will demonstrate an understanding of the relationship between the area of a rectangle, and the area of both triangles and parallelograms.
Students might write and/or model their task independently. Students can also be interviewed by their teacher.
An alternative assessment opportunity should be offered if this tool will not successfully capture what the student knows, understands or can do.
Visual Number Talk
String of Related Problems?
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Visual Number Talk Prompt #1
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Visual Number Talk Prompt #2
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Visual Number Talk Prompt #3
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Visual Number Talk Prompt #4
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Assessment
Assessment Considerations…
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Assessment: Area of a Triangles and Parallelograms
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Considerations to Promote Student Growth
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We suggest collecting this reflection as an additional opportunity to engage in the formative assessment process to inform next steps for individual students as well as how the whole class will proceed.
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Resources and Downloads
Lesson Tip Sheet
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Videos & Images
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Keynote Slides
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PowerPoint Slides
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BLM Handout
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Printable Handout
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Explore The Entire Unit of Study
This Make Math Moments Task was designed to spark curiosity for a multi-day unit of study with built in purposeful practice, and extensions to elicit and emerge mathematical models and strategies.
Click the links at the top of this task to head to the other related lessons created for this unit of study.
Visual Number Talk Prompt #1
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Visual Number Talk Prompt #2
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Visual Number Talk Prompt #3
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Visual Number Talk Prompt #4
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