Lesson Plan: Word Problems to 20
Grade Level: 1
Subject: Mathematics
Duration: 30 minutes
Topic: Word Problems to 20
Objectives
- Students will be able to understand and solve simple word problems involving addition and subtraction within the number 20.
- Students will develop critical thinking skills by interpreting the problems and determining the correct operation to use.
Materials Needed
- Whiteboard and markers
- Word problem cards (with simple scenarios)
- Counting manipulatives (such as blocks or counters)
- Worksheets for practice
Introduction (5 minutes)
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Engage Students:
- Begin the lesson by asking students if they have ever had a problem that needed to be solved.
- Share a simple word problem (e.g., "If you have 3 apples and I give you 2 more, how many apples do you have now?").
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Explain the Importance:
- Discuss how word problems help us understand math in real life and how they can be fun to solve.
Direct Instruction (10 minutes)
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Introduce Word Problems:
- Explain what a word problem is and how it usually describes a situation that can be solved with math.
- Write a few examples on the board:
- "There are 5 birds on a tree. 3 more birds come. How many birds are there now?"
- "You have 15 candies and you give away 4. How many candies do you have left?"
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Model Solving Word Problems:
- Solve the first example as a class, showing how to identify the numbers, what operation to use, and how to write the equation:
- Solve the second example, emphasizing subtraction:
Guided Practice (10 minutes)
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Word Problem Cards:
- Divide students into small groups and give each group a set of word problem cards.
- Have the groups work together to read and solve the problems.
- Circulate around the room to offer assistance and observe their problem-solving strategies.
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Share Solutions:
- After 5 minutes, reconvene and have each group share one word problem and its solution with the class. Encourage students to explain their thinking.
Independent Practice (5 minutes)
- Worksheet Activity:
- Distribute a worksheet with word problems for students to solve independently.
- Example problems:
- "Anna has 7 balloons. She gives away 2. How many does she have now?"
- "Tom sees 9 ducks. 4 more ducks join them. How many ducks are there in total?"
Conclusion (3 minutes)
- Summarize the lesson by revisiting the importance of word problems and the strategies used to solve them.
- Encourage students to think about word problems they encounter in their daily lives.
Homework
- Word Problems Worksheet:
- Complete the following problems at home:
- "Lily has 8 stickers. She gets 3 more. How many stickers does she have?"
- "There are 10 fish in a bowl. 5 swim away. How many fish are left?"
- "Ben has 4 toy cars, and his friend gives him 2 more. How many toy cars does Ben have now?"
- "Samantha bakes 12 cookies and eats 2. How many cookies are left?"
Answers to Homework
- 8 + 3 = 11 (Lily has 11 stickers)
- 10 - 5 = 5 (There are 5 fish left)
- 4 + 2 = 6 (Ben has 6 toy cars)
- 12 - 2 = 10 (Samantha has 10 cookies left)
This lesson plan provides a structured approach to teaching first-grade students how to solve word problems within 20, combining explanation, practice, and real-world application.