CCSS.Math.Content.3.G.A

CCSS.Math.Content.3.G.A is a cluster heading. These are the individual standards under it.

• CCSS.Math.Content.3.G.A.1

  Understand that shapes in different categories (e.g., rhombuses, rectangles, and others) may share attributes (e.g., having four sides), and that the shared att...

• CCSS.Math.Content.3.G.A.2

  Partition shapes into parts with equal areas. Express the area of each part as a unit fraction of the whole.

01

What Students Need to Do

Students identify, draw, and sort shapes by attributes such as number of sides, equal sides, parallel sides, and right angles. They also partition shapes into equal-area parts and name each part as a unit fraction.

02

What Mastery Looks Like

A student can place a square in the rectangle and quadrilateral groups, then name the attributes that justify each choice. The student can divide a shape into equal-area parts and name one part correctly.

03

Common Misconceptions

Students often classify shapes by how they are turned, or think a square is not a rectangle. They may call unequal pieces fourths simply because there are four pieces.

04

How to Assess It

Give an exit ticket asking students to draw a quadrilateral that is not a rectangle, explain why a square is a rectangle, and partition a rectangle into fourths.

1. 01

   Give pairs polygon cutouts to sort by number of sides, equal sides, parallel sides, and right angles.

2. 02

   Ask, "Is every square a rectangle?" Students write a claim and support it with named attributes.

3. 03

   Play Attribute Bingo using clues such as four equal sides, two pairs of parallel sides, or three equal-area parts.

4. 04

   Photograph floor tiles, signs, and windows, then label each shape and list the attributes that support the label.

• CCSS.Math.Content.2.G.A

  The 2nd Grade version of this standard.

• CCSS.Math.Content.2.G.A.1

  Recognize and draw shapes having specified attributes, such as a given number of angles or a given number of equal faces. Identify triangles, quadrilaterals, pe...

• CCSS.Math.Content.1.G.A.1

  Distinguish between defining attributes (e.g., triangles are closed and three-sided) versus non-defining attributes (e.g., color, orientation, overall size); bu...

• CCSS.Math.Content.1.G.A

  The 1st Grade version of this standard.