| 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 | Adding and subtracting within 50 |
| What length (min) | 30 |
| What age group | Doesn't matter |
| 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 |
Adding and Subtracting Within 50
Elementary (Grades 1-3)
Mathematics
20 Students
The lesson aligns with the Common Core State Standards for Mathematics, specifically focusing on arithmetic operations and place value.
| Step Number | Step Title | Length (minutes) | Details |
|---|---|---|---|
| 1 | Introduction | 5 | Introduce the topic of adding and subtracting within 50. Engage students with a question to activate prior knowledge. |
| 2 | Direct Instruction | 10 | Explain the concepts of addition and subtraction within 50. Use examples and solve a few problems on the whiteboard. |
| 3 | Guided Practice | 5 | Work through problems as a class, guiding students to solve them orally and on the board. Ensure understanding through questioning. |
| 4 | Activity: Printable Cards | 5 | Hand out printable cards for students to fill in during the lesson. Explain the task clearly. Include various problems for them to solve using addition and subtraction. |
| 5 | Individual Practice | 3 | Students work independently on a short set of problems to reinforce their skills, using the cards as a guide. |
| 6 | Check for Understanding | 2 | Randomly check cards for completion as students work. Provide feedback as necessary without formal presentations. |
| 7 | Assign Homework | 2 | Explain the homework assignment that reinforces adding and subtracting within 50. Give clear instructions without revealing questions. |
| 8 | Closing Remarks | 3 | Conclude the lesson by summarizing what was covered and addressing any questions. Provide encouragement for practicing at home. |
Students will be assigned a set of problems to practice adding and subtracting within 50. The homework will be checked for completion in the next class without requiring student presentations.
"Good morning, class! Today we are going to dive into the world of addition and subtraction. Can anyone tell me what addition means? Yes! It’s when we put numbers together. And how about subtraction? Great! It’s when we take numbers away. Now, why do you think it’s important to add and subtract numbers within 50? Think about things you do every day, like shopping or playing games. Let's explore this together!"
"Alright, let’s start with addition. When we add two numbers, we find the total. For example, if I have 23 apples and I get 14 more, how can we find out how many apples I have altogether? Watch closely as I write this on the board: 23 + 14. Let's add those together. What do we get? That's right! We find that 23 plus 14 equals 37.
Now, onto subtraction! If I have 50 cookies and I give away 15, how can we find out how many cookies are left? Let's write it down: 50 - 15. Can someone tell me how to solve this? Correct! We subtract 15 from 50, and we find that there are 35 cookies left."
"Now let’s practice together! I’m going to write a few problems on the board, and I want you to think about how we can solve them. Here’s our first problem: 32 + 13. Who can tell me how to solve this? Yes, excellent! We add the numbers to find the total. Now let’s try one more: 45 - 20. Who wants to share how they would solve this? Fantastic! Great job explaining that process.
Let’s keep the momentum. I’ll write a few more problems, and we’ll work through them as a class."
"Now it's time for a fun activity! I have some printable cards for each of you. On these cards, you will find various addition and subtraction problems. I want you to fill them in as we go along. Your task is to solve the problems on these cards using the strategies we talked about. You have 5 minutes to work on them. Ready? Go!"
"Okay, everyone! Now it’s your turn to work independently. Using the problems on your cards, I want you to solve a short set of problems on your own. Remember to use what we learned to help you. You have 3 minutes to complete this. Let’s see how you do!"
"I’ll be walking around to see how you’re doing. I’ll check your cards to see if you’re completing the problems correctly. Don’t worry, I’m just here to help you and provide feedback if needed. Keep up the great work!"
"Alright class, as we wrap up for today, I want to assign some homework. You will have a set of problems to practice more on adding and subtracting within 50. Make sure to complete it by our next class. I want you to show what you’ve learned. You don’t need to worry about presenting; just bring it back completed. Any questions about the homework?"
"Great job today, everyone! We’ve learned how to add and subtract numbers within 50, and I’m really proud of your efforts. If you have any questions at home while you’re practicing, feel free to ask me. Keep practicing, and remember, every time you solve a problem, you're becoming better at math! Have a wonderful day!"
Solve the following addition problems:
Solve the following subtraction problems:
Combine your knowledge of addition and subtraction:
Create your own addition problem using numbers under 50 and solve it. Show your work.
Create your own subtraction problem using numbers under 50 and solve it. Show your work.
Word Problem: You are at a party and there are 30 balloons. 15 balloons pop. How many balloons are left at the party?
Reflection: Write a few sentences about why adding and subtracting numbers within 50 is important in everyday life. Give at least two examples.
| Question | Answer |
|-----------------------------------------------------------------------|--------|
| What does addition mean? | |
| Can you explain how to solve the problem 23 + 14? | |
| What is the total when you add 32 + 13? | |
| How do you find the number of cookies left after giving away 15 from 50? | |
| What does subtraction mean? | |
| How do we solve the problem 45 - 20? | |
| Why is it important to be able to add and subtract within 50? | |
| What problems did you practice on your printable cards? | |
| How can you check your answers for the addition problems? | |
| What strategies can help you when adding or subtracting numbers? | |
| How many problems do you have to complete for homework? | |
| What should you do if you have questions while doing your homework? | |