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# Standard #: MA.3.GR.2.1

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Explore area as an attribute of a two-dimensional figure by covering the figure with unit squares without gaps or overlaps. Find areas of rectangles by counting unit squares.

### Clarifications

Clarification 1: Instruction emphasizes the conceptual understanding that area is an attribute that can be measured for a two-dimensional figure. The measurement unit for area is the area of a unit square, which is a square with side length of 1 unit.

Clarification 2: Two-dimensional figures cannot exceed 12 units by 12 units and responses include the appropriate units in word form (e.g., square centimeter or sq.cm.).

### General Information

Subject Area: Mathematics (B.E.S.T.)
Strand: Geometric Reasoning
Status: State Board Approved

#### Related Courses

 Course Number1111 Course Title222 5012050: Grade Three Mathematics (Specifically in versions: 2014 - 2015, 2015 - 2022, 2022 and beyond (current)) 7712040: Access Mathematics Grade 3 (Specifically in versions: 2014 - 2015, 2015 - 2018, 2018 - 2022, 2022 and beyond (current)) 5012055: Grade 3 Accelerated Mathematics (Specifically in versions: 2019 - 2022, 2022 and beyond (current)) 5012015: Foundational Skills in Mathematics 3-5 (Specifically in versions: 2019 - 2022, 2022 and beyond (current))

#### Related Access Points

 Access Point Number Access Point Title MA.3.GR.2.AP.1 Explore area as an attribute of a two-dimensional figure that can be measured by covering the figure with unit squares without gaps or overlaps.

#### Formative Assessments

 Name Description Complete the Rectangle Students are given a rectangle with one column and one row of unit squares (same size squares) drawn. Students are asked to complete and then find the total number of same size squares in the partition. How Many Units? Students are given a rectangle with some columns and rows partially constructed. Students are asked to find how many same-size squares are in the rectangle. Construct Rows and Columns Students are given a rectangle with tick marks drawn horizontally on one side of the rectangle and vertically on the bottom of the rectangle. Students are asked to partition the rectangle into columns and rows and then determine how many unit squares (same-size squares) are in the rectangle. Partition the Rectangle Into Unit Squares Students are given a rectangle with one unit square (same size square) drawn in the corner of the rectangle. Students are asked to draw the remaining unit squares and then find the total number of unit squares in the rectangle. Using Tiles of Different Sizes Students consider whether tiling a rectangle with different sized tiles is appropriate when calculating area. Unit Square Students are asked to explain how the area of a rectangle can be calculated and their responses are examined for references to the unit square as the unit of measurement. Overlapping Tiles Students are asked to evaluate another student's area calculation that involves overlapping tiles. Calculating Area Students discuss the meaning of area and are asked about the kinds of figures for which area can be calculated. Dawn’s Vegetable Garden Students are given a diagram showing a garden shaped like an irregular hexagon and are asked to find the area by counting the number of unit squares the figure contains. Area of a Right Trapezoid Students determine the area of a right trapezoid. How Many Square Units? Students determine the area of a right triangle. Fenced Dog Run Students are given a diagram showing a rectangular dog run and asked to find its area.

#### Original Student Tutorials

 Name Description Building a Square Garden Learn to identify one square unit that can be used to measure area in this brief interactive tutorial. Techies Talk Area Discover how square units can be used to cover the interior of a rectangle and measure its area of a rectangle in this interactive tutorial.

#### Original Student Tutorials

 Name Description Building a Square Garden: Learn to identify one square unit that can be used to measure area in this brief interactive tutorial. Techies Talk Area: Discover how square units can be used to cover the interior of a rectangle and measure its area of a rectangle in this interactive tutorial.

Printed On:11/29/2022 7:57:09 AM
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