KOAA2 About the Math, Learning Targets, and Opportunities for Enrichment

Full Standard

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

Measurement Topic

This standard is reported on the report card in these quarters as follows:

About the Math

 Skills and concepts below are learning goals for this standard.

• Represent addition word problems with objects or drawings.
• Represent subtraction word problems with objects or drawings.
• Add within 10. 
• Subtract within 10.
• Solve addition and subtraction word problems using objects and drawings.

When introducing addition and subtraction problems, make sure you are incorporating the various problem structures (refer to the "Problem Solving" page). Addition and subtraction problems are divided into categories based on the kinds of relationships that are involved. These include join problems, separate problems, part-part whole problems, and compare problems. Students do not need to know the structures but teachers should make sure when they are creating problems that all structures are represented.

Progression of Standard within Kindergarten

This progression informs how to develop the standard within the grade level. This progression is provided by HCPSS Elementary Mathematics.

Progression of this Standard Across Grades

This progression is informed by the Achieve the Core Coherence Map Links to an external site.. Information is not the complete standard.

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Tasks 

 These tasks can be used with small group or whole group instruction. 

• Show students an expression or equation. Example: 4 + 1. Allow students access to animal counters to tell a story that relates to the expression. Encourage students to share how their story connects to the expression. “I had four frogs sitting by a pond and then one more came over to join them.” Students can share their stories and/or draw a picture to match their story. Note: When students act out subtraction stories, make sure they understand the concept of removal. How can they show that in a drawing? Look for students who are building subtraction models with both quantities (like they would for addition) to correct any early misconceptions. Prompt them to show how they are taking away by crossing out objects.
• Jazmin picked four apples from the tree. She needed 12 apples in all.  How many more apples does Jazmin need to pick?
• There were 18 children on the soccer team. Ten of them were girls.  How many boys were on the swim team?
• Twelve books were returned to the library. Four more books were dropped off.  How many books were returned to the library altogether?
• Jose earned 4 smiley faces in the morning. He needed 8 at the end of the day to play basketball.  How many more smiley faces does he need?

SLIDE-BASED TASKS 

  These links are HCPSS created instructional tasks. These tasks are provided in Google slides. These tasks should be used for inspiration and resources, but instruction should start with students having the opportunity to engage with the math first (often involving physical and/or visual models) followed by discussion and explicit instruction to ensure student understanding.

Additional Tasks 

  These links provide instructional ideas connected to this standard. 

• Ten Flashing Fireflies Links to an external site. (Illustrative Mathematics)
• Humpty Dumpty Links to an external site. (3 Act Task, G.Fletcher)
• MSDE Lesson Seeds 
  • Understanding Addition and Subtraction Download Understanding Addition and Subtraction
  • Composing a Number to 10 in a Variety of Ways Download Composing a Number to 10 in a Variety of Ways
  • Solving Problems Download Solving Problems

Tasks From Print Resources

  These publications have been provided for each school. They are typically stored in team closets or the media center. Check with your team leader if you cannot find them. 

All kindergarten teams have been provided with the resources listed below.

Print Resources

Book Thumbnail	Title	Reference
	Teaching Student-Centered Mathematics by: John A. Van de Walle and Lou Ann H. Lovin	Activity 3.2 - Missing Part Subtraction, p. 74
	Hands-On Standards published by: Learning Resources	Lesson 13 - Joining Problems, p. 40 Lesson 14 - Using the Plus Sign, p. 42 Lesson 16 - Separating Problems, p. 46 Lesson 17 - Using the Minus Sign, p. 48 Lesson 22 - Addition: Sums to 10, p. 58 Lesson 23 - Subtraction: Differences from 10, p. 60
	Math Intervention K-2 by: Jennifer Taylor-Cox	Big Top Twelve, p. 96-97 Hungry Frog, p. 113-114 Broken Towers, p. 117 Compare Bear, p. 120-121 Hundred Tic-Tac-Toe, p. 124 X Marks the Spot, p. 127-130 Funny Bunny, p. 133-136 Race to the Top, p. 139-141 Race to the Bottom, p. 144-145
	Developing Number Concepts Book 2 by: Kathy Richardson	Activity 1-5: Acting Out Stories to go With Equations, p. 25 Activity 1-6: Roll and Count, p. 26 Activity 1-11: Complex Addition/Subtraction Stories, p. 31 Activity 2-18: Counting Boards: Making up Number-Combination Stories, p. 86 Activity 3-20: Counting Boards: Think and Write p. 143
	Basic Math Facts by: Susan O'Connell and John SanGiovanni	Circle Circle, p. 26 Capture and Count, p. 27 Fact Card Jumps, p. 44 Hop The Line, p. 44 Dot Card Addition- Link to Dot Card Addition Cards and Dot Card Add Wheel, p. 44 Plus One Two Bingo- Link to Addition Bingo and Addition Bingo Wheel, p. 44

Tasks Connected to Literature

  Suggested titles to support the standard can be found below. Check your school library or Howard County Library System for availability, or purchase using Materials of Instruction (MOI) funds. When available, select links to view activities aligned to each title.

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Centers

  These print resources can be used during independent or center time. These resources could also be used as lesson seeds.

• Number Clues Download Number Clues
  (HCPSS-adapted resource)

PRACTICE/ASSESSMENT

  These materials can be used for independent practice and/or for assessment purposes. These tasks align with the learning goals for the standard. 

Assessment and Instructional Tasks

• Task 1A: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 1A Materials Links to an external site.
• Task 1B: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 1B Materials Links to an external site.
• Task 2A: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 2A Materials Links to an external site.
• Task 2B: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 2B Materials Links to an external site.
• Task 3A: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 3A Materials Links to an external site.
• Task 3B: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 3B Materials Links to an external site.
• Task 4A: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 4A: Materials Links to an external site.
• Task 4B: K.OA.A.1 & K.OA.A.2 Links to an external site. and Task 4B: Materials Links to an external site.

• K.OA.A.2 Two Story Problems Links to an external site.
• K.OA.A.2 Two Story Problems 2 Links to an external site.
• K.OA.A.2 Some Red and Yellow Counters Links to an external site.
• K.OA.A.2 Addition and Subtraction Story Problems 1 Links to an external site.
• K.OA.A.2 Addition and Subtraction Story Problems 2 Links to an external site.
• K.OA.A.2 Addition and Subtraction Problems- Result Unknown Links to an external site.
• K.OA.A.2 Assessment Recording Sheet Links to an external site.

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Full Standard

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

Measurement Topic

The standard is reported on the report card through these measurement topics. Expand the measurement topic for a description of what students who meet expectation are able to do.

Kindergarten Students Learning Kindergarten Standards by Measurement Topic

KOA2 Anecdotal Data Collection Tool for Addition Links to an external site.

KOA2 Anecdotal Data Collection Tool for Subtraction Links to an external site.

Visit the SBIR (Standards Based Instruction and Reporting) page in Course Essentials for more information and clarification. 

Rubric (for thinking and reasoning evidence)

Use this rubric for observation and constructed responses (tasks that require explanation, justification, and/or representation).

Rubric for Tasks (pdf) Links to an external site.

Exemplars for this standard (if available)

These samples are examples of what it might look like for a student who MEETS EXPECTATIONS, is MAKING PROGRESS, and/or is MAKING LIMITED/NO PROGRESS.

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