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Multiply It Up!

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Lesson Plan

Multiply It Up!

Students will be able to understand multiplication as repeated addition and solve simple multiplication problems (e.g., 2 groups of 3).

Understanding multiplication is a superpower for solving problems faster and is a key building block for more advanced math in the future. This lesson helps students build a strong foundation.

Audience

2nd Grade Students

Time

30 minutes

Approach

Through visual examples, interactive discussions, and hands-on activities.

Materials

Multiply It Up! Slide Deck, Warm-Up: Grouping Game, Worksheet: Multiplication Practice, Activity: Array Adventures, and Cool-Down: Show What You Know

Prep

Teacher Preparation

15 minutes

Step 1

Warm-Up: Grouping Game

5 minutes

  • Begin with the Warm-Up: Grouping Game to activate prior knowledge about groups and counting.
    - Ask students to form small groups based on a given number (e.g., 'Form groups of 3!').

Step 2

Introduction to Multiplication

8 minutes

Step 3

Activity: Array Adventures

10 minutes

  • Introduce the concept of arrays using Multiply It Up! Slide Deck (Slide 5).
    - Distribute manipulatives and instruct students to complete the Activity: Array Adventures.
    - Circulate to assist students and encourage them to explain their arrays as repeated addition.

Step 4

Worksheet: Multiplication Practice

5 minutes

  • Distribute the Worksheet: Multiplication Practice.
    - Guide students through the first one or two problems together.
    - Allow students to work independently on the remaining problems. Collect for assessment.

Step 5

Cool-Down: Show What You Know

2 minutes

  • Administer the Cool-Down: Show What You Know.
    - Have students complete the exit ticket to gauge their understanding of the lesson's key concepts.
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Slide Deck

Let's Count Faster!

Today, we're going to learn a super speedy way to count groups of things!

Welcome students and introduce the topic of finding quick ways to count groups.

Repeated Addition: Socks!

Imagine you have 3 pairs of socks. How many socks is that?

Pair 1: 2 socks
Pair 2: 2 socks
Pair 3: 2 socks

2 + 2 + 2 = ?

Explain that repeated addition is adding the same number multiple times. Use the example of socks.

Introducing Multiplication!

Multiplication is a fancy word for repeated addition!

Instead of 2 + 2 + 2, we can say:

3 groups of 2
or
3 x 2

'x' means 'groups of'

Introduce the multiplication symbol and explain its meaning. Connect it to the sock example.

Apples in Groups

Look at these apples:

Group 1: 4 apples
Group 2: 4 apples

How many groups? _____
How many in each group? _____

Repeated Addition: 4 + 4 = ?
Multiplication: ____ x ____ = ?

Provide another example with groups of apples. Ask students to identify the repeated addition and the multiplication expression.

What's an Array?

An array is a way to show equal groups in rows and columns.

Like this:
šŸŽšŸŽšŸŽ
šŸŽšŸŽšŸŽ

How many rows? ____
How many in each row? ____

This is 2 groups of 3!
2 x 3 = 6

Explain what an array is and how it shows equal groups in rows and columns. Use a visual example.

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Script

Script: Multiply It Up!

Warm-Up: Grouping Game (5 minutes)

"Good morning, mathematicians! Let's get our brains warmed up today with a quick grouping game. When I say a number, I want you to quickly and quietly form groups of that many people. Ready? Form groups of 3!"

(Observe students forming groups. If time allows, repeat with a different number, e.g., 'Form groups of 2!')

"Great job, everyone! Take your seats. Today, we're going to learn about a super speedy way to count groups of things, just like we did now!"

Introduction to Multiplication (8 minutes)

(Display Multiply It Up! Slide Deck - Slide 1: Let's Count Faster!)

"Look at our first slide! It says 'Let's Count Faster!' Sometimes, we have many groups of the exact same number of things, and adding them all up can take a little bit of time. Today, we're going to learn a trick to make it faster!"

(Display Multiply It Up! Slide Deck - Slide 2: Repeated Addition: Socks!)

"Let's think about socks. Who has socks on today? Imagine you have three pairs of socks. How many individual socks would that be? Talk to your neighbor for a moment."

(Allow brief discussion.)

"A pair means two socks, right? So, if you have 3 pairs, you have 2 socks, plus another 2 socks, plus another 2 socks. That's 2 + 2 + 2. Can someone tell me what 2 + 2 + 2 equals?"

(Wait for response: 6)

"Exactly! Six socks. We call this 'repeated addition' because we are adding the same number again and again."

(Display Multiply It Up! Slide Deck - Slide 3: Introducing Multiplication!)

"Now, here's the exciting part! There's a special math word for repeated addition. It's called multiplication! Can everyone say that with me? Multi-pli-ca-tion!"

"Multiplication is just a fancy, quicker way to write repeated addition. Instead of writing 2 + 2 + 2, we can say '3 groups of 2.' And in math, we use a special symbol that looks like an 'x' to mean 'groups of.' So, 3 groups of 2 becomes 3 x 2."

"The 'x' means 'times' or 'groups of.' So, 3 x 2 means 3 groups of 2. And what did we say 3 groups of 2 was? Six! So, 3 x 2 = 6."

(Display Multiply It Up! Slide Deck - Slide 4: Apples in Groups)

"Let's try another one with these apples. Look at the picture. How many groups of apples do you see? And how many apples are in each group?"

(Wait for responses: 2 groups, 4 apples in each group.)

"Excellent! So, how would we write that as repeated addition? Everyone together: 4 + 4! And what does that equal?"

(Wait for response: 8)

"Fantastic! Now, how would we write that using our new multiplication symbol? Remember, it's 'how many groups' multiplied by 'how many in each group.'"

(Guide students to say 2 x 4 = 8.)

"You've got it! 2 x 4 = 8. Great work making that connection!"

Activity: Array Adventures (10 minutes)

(Display Multiply It Up! Slide Deck - Slide 5: What's an Array?)

"Now, let's look at another way to show equal groups, called an array. An array is when we arrange things in neat rows and columns, just like these apples on the slide."

"See how we have 2 rows, and 3 apples in each row? That's 2 groups of 3! So, 2 x 3 = 6."

"Now it's your turn to be array architects! I'm going to give each of you some small manipulatives. Your job is to create different arrays. Let's start with an example. Everyone, use your manipulatives to make an array for '3 groups of 4.' What would that look like?"

(Circulate, assist, and encourage students to create 3 rows with 4 manipulatives in each row.)

"Excellent! Now, using your manipulatives, complete the Activity: Array Adventures. It has more challenges for you to create different arrays and write the matching multiplication problem."

(Distribute Activity: Array Adventures. Circulate and provide support as needed. Ask students to explain their arrays as repeated addition.)

Worksheet: Multiplication Practice (5 minutes)

"Alright, array architects, let's put our new multiplication skills to the test with some practice problems! I'm handing out the Worksheet: Multiplication Practice."

*(Distribute Worksheet: Multiplication Practice.)

"Let's do the first problem together. It asks you to draw groups and write the repeated addition and multiplication sentence. For '2 groups of 5', how many circles would you draw in each group? Five! And how many groups? Two! So, 5 + 5 = 10, and 2 x 5 = 10. You try drawing it!"

(Guide students through the first problem.)

"Now, try the rest of the worksheet on your own. Do your best to show your work by drawing pictures if it helps!"

(Allow students to work independently. Collect worksheets at the end of the time.)

Cool-Down: Show What You Know (2 minutes)

"Wonderful work today, everyone! To finish up, I have a quick 'Show What You Know' for you. This will help me see what you learned today."

*(Distribute Cool-Down: Show What You Know.)

"Please complete this short cool-down activity and turn it in as you leave. Thank you for being such great mathematicians today!"

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Warm Up

Warm-Up: Grouping Game

Instructions: Listen carefully to the number your teacher calls out. Quickly and quietly form groups with that many classmates!

For example, if your teacher says, "Form groups of 4!" you will find 3 other people to stand with.

Ready for the challenge?













(Teacher: Call out numbers like 3, 2, or 4 for students to form groups. Observe their ability to create equal groups.)

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Activity

Activity: Array Adventures!

Instructions: Use your manipulatives (like cubes or counters) to build the arrays below. Then, write the repeated addition and the multiplication sentence that matches your array!

1. Build an array for 2 groups of 4.

Draw your array here:






Repeated Addition: ______________

Multiplication Sentence: ______________

2. Build an array for 3 groups of 2.

Draw your array here:






Repeated Addition: ______________

Multiplication Sentence: ______________

3. Build an array for 4 groups of 3.

Draw your array here:






Repeated Addition: ______________

Multiplication Sentence: ______________

4. Build an array for 2 groups of 5.

Draw your array here:






Repeated Addition: ______________

Multiplication Sentence: ______________

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Worksheet

Worksheet: Multiplication Practice

Instructions: For each problem, draw a picture to show the groups, then write the repeated addition sentence and the multiplication sentence.

1. 2 groups of 5

Draw your groups here:






Repeated Addition: ______________

Multiplication Sentence: ______________

2. 3 groups of 3

Draw your groups here:






Repeated Addition: ______________

Multiplication Sentence: ______________

3. 4 groups of 2

Draw your groups here:






Repeated Addition: ______________

Multiplication Sentence: ______________

4. 5 groups of 1

Draw your groups here:






Repeated Addition: ______________

Multiplication Sentence: ______________

5. 2 groups of 6

Draw your groups here:






Repeated Addition: ______________

Multiplication Sentence: ______________

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Cool Down

Cool-Down: Show What You Know

Instructions: Answer the questions below to show what you learned about multiplication today.

1. What does the x symbol mean in multiplication?




2. Draw 3 groups of 4. Then write the repeated addition and multiplication sentence.

Draw your groups here:






Repeated Addition: ______________

Multiplication Sentence: ______________

3. If you have 2 bags with 5 candies in each bag, how many candies do you have in total? Write a multiplication sentence to show your answer.




Multiplication Sentence: ______________

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Multiply It Up! • Lenny Learning