CCSS.Math.Content.K.OA.A

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

• CCSS.Math.Content.K.OA.A.1

  Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions...

• CCSS.Math.Content.K.OA.A.2

  Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

• CCSS.Math.Content.K.OA.A.3

  Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or eq...

• CCSS.Math.Content.K.OA.A.4

  For any number from 1 to 9, find the number that makes 10 when added to the given number, e.g., by using objects or drawings, and record the answer with a drawi...

• CCSS.Math.Content.K.OA.A.5

  Fluently add and subtract within 5.

01

What Students Need to Do

Students use objects, fingers, drawings, sounds, or movement to model groups that grow, combine, separate, or shrink. They describe what happened and find the new amount.

02

What Mastery Looks Like

Given a simple story, students choose whether to add or subtract and show the action with objects or drawings. They identify the starting amount, the change, and the result.

03

Common Misconceptions

Students may choose an operation by guessing from a single word instead of following the action in the story. They may recount the starting group but forget to include added objects or remove objects from the total.

04

How to Assess It

Give this exit ticket: “Draw 3 fish, add 2 fish, then show 5 fish with 1 swimming away. Write a number sentence for each action.”

1. 01

   Give pairs counters and cups, then have them act out teacher cards such as “Start with 4, add 2” or “Take 3 from 6.”

2. 02

   Show five toy animals with two moved away, then ask, “What changed, and which number sentence matches what you saw?”

3. 03

   Play Roll and Change: students roll a die, draw an add or subtract card, change a cube tower, and record the result.

4. 04

   During snack time, count crackers on a plate before and after adding or eating some, then describe how the amount changed.

• CCSS.Math.Content.1.OA.B.4

  Understand subtraction as an unknown-addend problem.

• CCSS.Math.Content.1.NBT.C

  Use place value understanding and properties of operations to add and subtract.

• CCSS.Math.Content.1.OA.B

  Understand and apply properties of operations and the relationship between addition and subtraction.

• CCSS.Math.Content.4.NF.B.3a

  Understand addition and subtraction of fractions as joining and separating parts referring to the same whole.