Lesson plan

Lesson Plan: Subtraction Math

Topic

Subtraction Math

Objectives

Understand the concept of subtraction.
Use subtraction in practical situations.
Enhance problem-solving skills through subtraction exercises.

Materials

Printable cards for each student.
Whiteboard and markers.
Visual aids (e.g., number line, counters).
Worksheets for practice.
Pencils and erasers.

Grade/Age Group

Year/Grade 1

Subject

Mathematics

Class Size

20 students

National Curriculum Standards

This lesson aligns with the Canadian mathematics curriculum for Grade 1, focusing on operational skills and understanding of subtraction.

Lesson Structure

Step Number	Step Title	Length	Details
1	Checking Homework	5 min	Review the assigned homework without students presenting; discuss common mistakes.
2	Introduction to Subtraction	5 min	Introduce the concept of subtraction using visual aids. Explain its practical use.
3	Activity: Printable Cards	10 min	Distribute printable cards; students fill in subtraction problems independently.
4	Guided Practice	5 min	Solve a few subtraction problems as a class using the whiteboard.
5	Activity: Collecting Cards	3 min	Randomly check or collect cards to assess understanding and provide feedback.
6	Assigning Homework	2 min	Assign additional subtraction problems for the next lesson.

Additional Notes

Encourage participation and ask students to share their thought processes during the guided practice.
Provide individualized support to those who struggle during the printable card activity.
Reinforce the importance of subtraction in daily life through examples.

Lesson script

Checking Homework

"Good morning, class! Before we dive into today's lesson, let's take a moment to review the homework from our last class. I won't ask anyone to present, but I'll go over some of the common mistakes I noticed.

First, remember that subtraction means taking one number away from another. For example, if you had 5 apples and you ate 2, how many apples do you have left? Right! You subtract 2 from 5.

Now, let's look at a few problems together on the board.

[Here, you may show a couple of examples of common errors and work through them.]*

I want you all to pay attention to the steps I take to solve these problems. If you made a mistake in your homework, think about how you could fix it next time."

Introduction to Subtraction

"Alright, everyone! Let’s jump into our main topic for today: subtraction!

Subtraction is not just about numbers; it’s about solving real-life problems. Can anyone tell me a time when you used subtraction at home or in your day-to-day life?

[Allow students to share their examples.]*

That's great! Today, we will be using some visual aids to help us understand subtraction better. Here, I have a number line.

[Demonstrate the number line.]*

If I start at 7 on the number line and take away 3, I would move down to 4. This is subtraction in action!

Can anyone tell me what 7 minus 3 equals? Yes, that’s right! 4.

Now, let’s get ready for an activity where you can practice this skill."

Activity: Printable Cards

"Now, I’m going to give each of you a set of printable cards. Each card has a subtraction problem on it.

Your task is to work independently and fill in the answers on the cards. Remember to think carefully before you write your answers. If you’re not sure, look back at our number line or any of the counters we have!

You have 10 minutes to complete this, and then we’ll share some answers together. Ready? Go ahead and start!"

[Circulate around the classroom to provide support where needed.]*

Guided Practice

"Time's up! Great job, everyone! Now let's work together on some of the problems from your cards.

I’ll write a few of these subtraction problems on the whiteboard, and I want us to solve them as a class.

[Write down a few problems (e.g., 8 - 3, 5 - 1).]*

Let’s tackle the first one: What’s 8 minus 3?

[Wait for responses; guide the class as they work through the problem together.]*

That's right! It equals 5.

Now for the second one: How about 5 minus 1? Yes, it equals 4! Wonderful job, everyone!

Remember to think about the process: What's the starting number? What are we taking away? And what do we have left?"

Activity: Collecting Cards

"Now, I would like to collect your printable cards. I’ll do a quick check or random sampling to see how everyone did.

Make sure that your names are on your cards. I’ll walk around and glance through them.

[Take time to give quick feedback as you collect or check the cards.]*

If you got some wrong, don't worry! This is all part of learning, and we will keep practicing to get better."

Assigning Homework

"Before we wrap up, let’s assign some homework for our next lesson. I want you to try your hand at a few more subtraction problems.

You’ll find a worksheet in your folders that has a variety of subtraction questions. Please complete this for our next class.

Remember to take your time, and if you're unsure, refer back to our number line or visual aids.

Thank you for your hard work today, and I look forward to seeing you tackle those subtraction problems at home!"

Homework

What is 9 minus 4? Show your work using a number line.
If you have 12 candies and you give away 5, how many candies do you have left? Write a subtraction equation to represent this.
Solve the following: 15 - 7 = ? Explain the steps you took to find your answer.
Using counters or objects at home, demonstrate subtraction by showing how you can take away 3 from 10. What is the result?
Write down a real-life situation where you had to use subtraction. Describe the problem and how you solved it.
If the school has 20 students and 8 students go home early, how many students are still at school? Set up the subtraction equation and solve it.
On a piece of paper, create your own subtraction problem and solve it. Be sure to explain your thought process.
Compare the following two subtraction problems. Which one is greater, and by how much?
- A: 10 - 3
- B: 8 - 2
Collect four items from around your home. If you had 6 of each item and then you used 2 of them, how many do you have left for each item? Write down the subtraction equation for each item.
As a challenge, solve this problem using a number line: 14 - 6 = ? Describe how you moved along the number line to find the answer.

Printables

| Question                                         | Answer |
|--------------------------------------------------|--------|
| What does subtraction mean?                      |        |
| How do you solve a subtraction problem?         |        |
| Can you give an example of when you use subtraction in real life? |        |
| What is the result of 7 minus 3?                |        |
| How do you use a number line for subtraction?   |        |
| What do we do first when solving a subtraction problem? |        |
| What is 8 minus 3?                              |        |
| What do we call the number we start with in subtraction? |        |
| What does the result of a subtraction problem represent? |        |
| How can visual aids help you understand subtraction better? |        |

Full lesson	Create for a teacher a set of content for giving a lesson, beginning with the lesson plan. Each new block of materials must begin with an H1 heading (other subheaders must be H2, H3, etc). When you describe required pictures, write those descriptions in curly brackets, for example: {A picture of a triangle}
Which subject	Mathematics
What topic	Subtraction math
What length (min)	30
What age group	Year or Grade 1
Class size	20
What curriculum
Include full script
Check previous homework
Ask some students to presents their homework
Add a physical break
Add group activities
Include homework
Show correct answers
Prepare slide templates
Number of slides	5
Create fill-in cards for students
Create creative backup tasks for unexpected moments