Lesson Plan:

# Basic Subtraction with Marshmallows

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Subject
Standards
August 28, 2015

## Learning Objectives

Students will be able to illustrate the operation of subtraction with answers of 10 or less.

## Lesson

### Introduction (5 minutes)

• Tell the students that today they will continue learning how to subtract.
• Remind them that subtract means to take away, and the number that is left is called the difference.

### Explicit Instruction/Teacher Modeling (10 minutes)

• Show the subtraction flashcards to the students. Read the subtraction problems together. For example, 7 - 3.
• Point out to the students that the second number tells how much to take away from the first number.
• Count out and place 7 cubes where all students can see them.
• Ask the students how many cubes there are and how many to take away.
• Remove three cubes. Ask the students how many cubes remain.
• Repeat the problem and answer for the students, pointing out that there are 4 remaining cubes.
• Choose another subtraction card and continue in the same manner as the previous problem.

### Guided Practice/Interactive Modeling (15 minutes)

• Pair students together.
• Give each pair 10 cubes and 2 subtraction flashcards.
• Instruct them to select one card and read the subtraction problem they see.
• Have them count out the number of cubes that represents the first number.
• Tell the students to find the number that is being taken away, and remove that number of cubes.
• Ask them to tell each other how many they have left.
• Tell them to read the subtraction problem on their flashcards with the answer.
• Direct your students to continue in the same manner with the other subtraction flashcard.

### Independent Working Time (15 minutes)

• Give each student a paper plate and cup filled with 10 miniature marshmallows.
• Pass out four flashcards to each pair.
• Instruct the other partner to count out the number of marshmallows they will need to depict the number that represents how many there are in all.
• Have your students take away the second number and identify the answer to the subtraction problem.
• Direct your students to complete the rest of the problems on their own.

## Extend

### Differentiation

• Enrichment: Give students index cards to write down each subtraction problem. Then, have them flip the cards over and write a fact family. For example, have them write 7 - 3 = 4 on the front and then 7 - 4 = 3 on the back.
• Support: Give students subtraction flashcards with the answers on the back so that they can check their answers.

## Review

### Assessment (10 minutes)

• Give the students the Let's Practice Subtraction worksheet.
• Collect and check the answers.

### Review and Closing (5 minutes)

• Remind the students of the steps they used when subtracting the cubes and marshmallows.
• Eat some marshmallows!