CCSS.Math.Content.1.G.A

CCSS.Math.Content.1.G.A is a cluster heading. These are the individual standards under it.

• 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.2

  Compose two-dimensional shapes (rectangles, squares, trapezoids, triangles, half-circles, and quarter-circles) or three-dimensional shapes (cubes, right rectang...

• CCSS.Math.Content.1.G.A.3

  Partition circles and rectangles into two and four equal shares, describe the shares using the words halves, fourths, and quarters, and use the phrases half of,...

01

What Students Need to Do

Students describe, compare, and sort shapes using features such as sides, corners, and curved edges. They join shapes to make new shapes. They split circles and rectangles into equal halves or fourths.

02

What Mastery Looks Like

Students name and sort shapes by sides, corners, and other defining features. They combine simple shapes to make larger ones. They divide circles and rectangles into equal halves or fourths and name the shares.

03

Common Misconceptions

Students may think color, size, or direction changes what a shape is. They may call unequal pieces halves or fourths. They may not see that small shapes can combine to make a larger shape.

04

How to Assess It

Give students a page with several shapes. Ask them to circle all triangles, build a new shape from two pieces, and divide a rectangle into four equal shares.

1. 01

   Give pairs pattern blocks and challenge them to make a hexagon in three different ways, then record the pieces used.

2. 02

   Ask, “Can a triangle be turned sideways and still be a triangle?” Students draw an example and explain their answer.

3. 03

   Play Attribute Guess Who with shape cards, using clues such as number of sides, corners, straight edges, or curved edges.

4. 04

   Take a classroom shape hunt, then sketch one object and label the shapes that combine to make it.

• 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.3.G.A

  The 3rd Grade version of this standard.