Double-Digit Addition Fun

Grade Level

6-8 Special Education (Severe to Moderate Disabilities)

Duration

80 minutes

Class Size

7 students

Standards Alignment

Minnesota Math Standards (Middle School)

MA.5.NBT.4: Use place value understanding to perform multi-digit arithmetic, including addition of two-digit numbers with regrouping.
MA.6.AR.2: Solve addition problems with two-digit numbers in real-world contexts.

Next Generation Science Standards (NGSS) Connections

While NGSS is primarily science-focused, it emphasizes problem-solving, modeling, and evidence-based reasoning that support mathematical thinking and scientific inquiry.

MS-ETS1-1: Define the criteria and constraints of a problem to design a solution.
MP.2 (Mathematical Practice): Reason abstractly and quantitatively.
MP.4 (Mathematical Practice): Model with mathematics.

Learning Objectives

By the end of this lesson, students will be able to:

Add double-digit numbers accurately with and without regrouping.
Use place value concepts to understand addition mechanics.
Represent addition problems with hands-on manipulatives and visual models.
Apply addition skills in engaging real-world contexts to build relevance and interest.
Communicate their problem-solving process clearly with support.

Materials Needed

Large base-ten blocks (ones and tens)
Visual place value charts (laminated, large print)
Number cards (10-99)
Whiteboards and markers
Addition problem strips with pictorial support
Sticky notes and colored pencils
"Store Day" role-play props (price tags, play money, small items)
Timer or clock with clear visuals

Lesson Outline

1. Warm-Up and Review (10 minutes)

Activity:

Use a large place value chart and base-ten blocks to review single-digit addition and place value concepts.
Show a simple addition problem (e.g. 7 + 5).
Demonstrate grouping of ones and the concept of regrouping when sum exceeds 9.
Check understanding with individual whiteboard responses: write down sums for quick problems.

Purpose: Reinforce foundational concepts needed for double-digit addition.

2. Introduction to Double-Digit Addition (15 minutes)

Instruction:

Introduce addition of two-digit numbers (e.g., 34 + 28) using visual place value charts.
Break down the problem into tens and ones places.
Use base-ten blocks to model the addition physically. Group the ones and exchange for tens if needed.
Repeat with 2-3 examples with student participation.

Support: Provide visual aids and repeat steps slowly, checking for comprehension.

3. Hands-On Group Activity: Store Day (20 minutes)

Scenario:
Students role-play a store shopping experience where they "buy" two items with prices in the double digits. Their task is to calculate total prices.

Steps:

Students select two price tags (e.g., 45 and 27).
Use base-ten blocks and place value charts to model the addition of their chosen prices.
Record their work on whiteboards or with sticky notes.
A peer or aide checks the answer and provides feedback with guided questions.

Objective: Real-world application promotes engagement, communication, and practical math skills.

4. Guided Practice with Support (15 minutes)

Activity:

Present double-digit addition problems on the board with visual supports (icons representing tens and ones).
Students solve problems individually or in pairs on laminated number strips.
Use whiteboards for immediate feedback.
Teacher and aides circulate, offering prompts and scaffolds as needed.

5. Formative Assessment & Reflection (15 minutes)

Assessment:

Each student completes 3-4 double-digit addition problems independently (modified to their ability).
Problems vary: some with regrouping, some without.
Use thumbs-up/down or smiley-face stickers to indicate confidence and understanding.

Reflection:

Group discussion on strategies that helped them solve problems.
Show-and-tell: students pick one problem and explain their thinking verbally or using manipulatives.

6. Wrap-Up and Preview (5 minutes)

Summarize:

Recap the main skills: breaking numbers into tens and ones, adding in parts, regrouping if needed.
Preview next lesson’s focus: subtraction of double-digit numbers with regrouping.

Closing:

Reward participation with personalized encouragement and visuals (stickers or thumbs-up charts).

Adaptations & Modifications

Use larger visuals and tactile manipulatives for sensory engagement.
Provide individual supports: one-on-one aides for guided questioning.
Allow extra time or breaks for students who need it.
Simplify numbers for early learners or increase complexity based on IEP goals.
Use assistive technology (speech-to-text math apps) where applicable.

Extensions (Optional)

Create collaborative math posters where each student illustrates and explains an addition problem.
Use a computer-based place value addition game aligned with lesson content for tech integration.

Teacher Reflection

Assess student engagement during activities and mastery during the formative assessment.
Note which scaffolds were most effective for each learner.
Plan for adjustments or reteaching based on performance data.

This lesson plan is built to provide hands-on, meaningful learning experiences for severe to moderate special education students, balancing concrete manipulatives with real-world context and scientific reasoning practices aligned with NGSS principles of problem-solving and modeling.