CCSS.Math.Content.K.MD.A

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

• CCSS.Math.Content.K.MD.A.1

  Describe measurable attributes of objects, such as length or weight. Describe several measurable attributes of a single object.

• CCSS.Math.Content.K.MD.A.2

  Directly compare two objects with a measurable attribute in common, to see which object has "more of"/"less of" the attribute, and describe the difference.

01

What Students Need to Do

Students identify features of objects that can be measured, such as length, height, weight, and capacity. They directly compare two objects using words like longer, shorter, heavier, lighter, more, or less.

02

What Mastery Looks Like

Given two classroom objects, a student names at least two features that could be measured. The student compares the same feature and uses a clear word such as longer, shorter, heavier, or lighter.

03

Common Misconceptions

Students may say one object is “bigger” without naming the feature they compared. They may assume taller objects are always heavier or compare lengths without aligning the ends.

04

How to Assess It

Give each student two classroom objects. Ask, “Name one feature you can measure, compare that feature, and explain how you know.”

1. 01

   Pairs align two crayons at one end to compare length, then place them on a balance scale to compare weight.

2. 02

   Show a tall empty bottle and a short full bottle. Ask, “Which is taller? Which is heavier? How do you know?”

3. 03

   Play Compare and Collect: partners choose two classroom objects, name an attribute, compare them, and earn a counter for a correct sentence.

4. 04

   During cleanup, ask children to decide which shelf is longer or which supply tub is heavier, then explain their comparison.

• 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.6.SP.B.5b

  Describing the nature of the attribute under investigation, including how it was measured and its units of measurement.