Mastering Addition Facts

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Grade: 2

Duration: 60 minutes
Class size: 25 students
Subject: Mathematics
Topic: Addition
Common Core State Standards:

• CCSS.MATH.CONTENT.2.OA.B.2 - Fluently add and subtract within 20 using mental strategies.
• CCSS.MATH.CONTENT.2.NBT.B.5 - Understand place value to add within 100.

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Learning Objectives (I Can Statements)

• I can add two one-digit numbers using strategies like counting on, making ten, and doubles.
• I can use number bonds and place value to add numbers up to 100.
• I can check my addition answers by using different methods.

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Success Criteria

• I can correctly solve addition problems within 20 using mental math strategies.
• I can explain how I found the answer using pictures, number bonds, or drawing tens and ones.
• I can show my work and verify my answers in at least two different ways.

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Materials Needed

• Whiteboard and markers
• Slide presentation (provided below)
• Counters or cubes for hands-on practice
• Number bond templates
• Individual mini-whiteboards and dry-erase markers (optional)
• Worksheet for guided and independent practice

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Lesson Flow Overview

Time	Activity	Description and Objectives
0-10 mins	Introduction & Hook	Engage students with an interactive addition story problem. Review “I can” and success criteria.
10-25 mins	Guided Practice with Strategies	Teach multiple addition strategies with visuals and manipulatives, check understanding with quick checks.
25-35 mins	Collaborative Addition Game	Partner game to reinforce adding within 20 using number bonds and mental math.
35-50 mins	Independent Practice	Students complete addition problems using learned strategies, with teacher support.
50-60 mins	Reflection and Extension Activities	Review success criteria, advanced challenges, and share strategies students used. Summarize learning.

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Slide Content for Presentation

Slide 1: Welcome & Learning Targets

• Title: Mastering Addition Facts
• "Today we will become addition experts!"
• I can add two numbers within 20 in different ways.
• Success Criteria: Solve addition facts, explain my thinking, and check my answers.

Slide 2: Addition Story Problem

• Picture of children sharing apples.
• Problem: "If Alice has 7 apples and Bob has 5 apples, how many apples do they have in all?"
• Question: How can we figure it out?

Slide 3: Strategy 1 - Counting On

• Explanation: Start with the bigger number, count up.
• Example: 7 + 5 → Start at 7, count 5 more: 8, 9, 10, 11, 12
• Visual: Number line showing jumps.

Slide 4: Strategy 2 - Make Ten

• Explanation: Break 5 into 3 and 2 to make 10 with 7.
• Example: 7 + 3 = 10, then 10 + 2 = 12
• Visual: Number bond diagram.

Slide 5: Strategy 3 - Doubles and Near Doubles

• Explanation: Use doubles facts you know.
• Example: 7 + 7 = 14, so 7 + 8 is 14 + 1 = 15
• Visual: Doubles chart.

Slide 6: Practice Time!

• Instructions for students to try 5 addition facts using strategies and manipulatives.
• Interactive: “Show your answers on your mini-whiteboards!”

Slide 7: Partner Game Instructions

• “Addition Race” – take turns drawing cards with numbers 1-10, add them, and check with your partner.
• Goal: First to 20 correct answers wins!

Slide 8: Independent Practice

• Sample problems: 14 + 5, 23 + 7, 9 + 6
• Reminder: Use drawing, number bonds, or mental math!

Slide 9: Success Criteria Review

• Did I solve addition problems correctly?
• Did I explain how I found the answers?
• Did I check my work in two ways?

Slide 10: Extension Challenge

• “Can you write a story problem using two numbers adding up to 20 or less? Draw a picture to show your solution.”

Slide 11: Reflection Time

• What strategy did you like best?
• How can these strategies help you in real life?

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Detailed Activities

1. Introduction & Hook (10 minutes)

• Start by telling the apple-sharing story (slide 2).
• Ask what strategies students can think of to add the apples.
• Write “I can…” and success criteria on board; have students repeat aloud.

2. Guided Practice (15 minutes)

• Model the three addition strategies (slides 3-5) using counters or cubes.
• After each example, ask students to try a similar problem on mini-whiteboards.
• Use thumbs-up/thumbs-down or quick check-ins to assess understanding.

3. Collaborative Addition Game (10 minutes)

• Pair students.
• Use number cards 1-10, each student draws two cards, adds the numbers, and explains their strategy to partner.
• Partners confirm answer with manipulatives or mental math.
• Teacher circulates to assist and challenge as needed.

4. Independent Practice (15 minutes)

• Provide problems varying from sums within 20 to sums near 100 (e.g., 14 + 5).
• Encourage use of drawings, number bonds, or mental math.
• Support students who struggle by providing additional visual aids or one-on-one help.

5. Reflection and Extension (10 minutes)

• Review success criteria using slide 9.
• Invite volunteers to share their favorite strategy or a tricky problem they solved.
• Provide the extension challenge (slide 10) for early finishers or advanced learners.
• Wrap up with slide 11 reflection and praise.

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Differentiation Strategies

Learner Type	Strategy
Struggling Learners	Use concrete manipulatives, visual aids (number lines, number bonds). Provide one-on-one support. Simplify problems to sums within 10 if needed.
English Learners	Use clear visuals, gestures, and word banks. Pair with bilingual peers. Repeat "I can" and success criteria in simpler language.
Advanced Learners	Provide multi-digit addition problems (e.g., 45 + 36). Challenge to write their own word problems and explain complex strategies. Encourage use of mental math shortcuts.
Kinesthetic Learners	Incorporate movement by having students physically jump along a number line taped on the floor during "counting on." Use hands-on manipulatives actively.

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Assessment

• Observe students during guided and independent practice for correct use of addition strategies.
• Review mini-whiteboard answers for accuracy and strategy use.
• Collect independent practice worksheets to assess understanding.
• Use student reflections and explanations as formative assessment of conceptual grasp.

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Notes for Teachers:

• Encourage students to verbalize their thought process to deepen conceptual understanding.
• Repeat “I can” statements frequently to build confidence and ownership.
• Keep the pace flexible depending on student reception; scaffold up or down as needed.

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End of Plan.