## 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.

- Perimeter measures the distance around a shape;
- Area measures the amount of space occupied within the shape;
- To measure the area of a rectangle, it must be completely covered by units of area (square units), without gaps or overlaps;
- The alignment of square units produces the rows and columns of an array, with the same number of units in each row;
- The array replaces the need to count individual units and makes it possible to calculate an area;
- Both the number of units in each row and the number of units in a column can be determined from the length of the rectangle’s sides;
- Different rectangles can have the same area;
- Rectangles that have the same area do not necessarily have the same perimeter;
- As a shape approaches a square, its area is maximized.

The independent assessment will allow students to demonstrate concepts and skills related to the following learning goals:

- I will use an array model to communicate my understanding of area.
- I will calculate the area of a rectangle.
- I will determine the dimensions of a rectangle when given the area.
- I will determine the perimeter of a rectangle when given the area.

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.

## Math Talk

### String of Related Problems

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### Assessment Considerations…

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### Assessment: Area of a Rectangle

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### Considerations to Promote Student Growth

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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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## 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.

### Math Talk Prompt

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### Question #1

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### Question #2

### Question #3

### Question #4

**Download Editable/Printable Handout**

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