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Which subject	Mathematics
What topic	Adding and subtracting negative and positive integers
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
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Include homework
Show correct answers
Prepare slide templates
Number of slides	5
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Lesson plan

Lesson Plan: Adding and Subtracting Negative and Positive Integers

Subject

Mathematics

Topic

Adding and Subtracting Negative and Positive Integers

Grade/Age Group

Middle School (Grades 6-8)

Length of Lesson

30 minutes

Number of Students

20

Objectives

• Students will understand the concept of positive and negative integers.
• Students will be able to add and subtract positive and negative integers using number lines and rules.
• Students will develop problem-solving skills through practice problems.
• Students will build confidence in working with integers in various contexts.

Materials

• Whiteboard and markers
• Number line visuals
• Worksheets with practice problems
• Calculators (optional)
• Homework assignment sheets

Lesson Structure

Step Number	Step Title	Length	Details
1	Introduction to Integers	5 min	Discuss what integers are, differences between positive and negative integers. Give examples (e.g., -3, 0, 2).
2	Using Number Lines	5 min	Introduce the number line. Demonstrate how to plot and visualize adding and subtracting integers.
3	Adding Positive and Negative Integers	10 min	Teach rules for adding integers (same sign vs. different signs). Work through examples on the board.
4	Subtracting Positive and Negative Integers	5 min	Explain the process of subtracting integers (turning subtraction into addition). Provide examples.
5	Guided Practice	5 min	Distribute worksheets for students to practice problems with a partner. Walk around to assist as needed.
6	Review and Homework Assignment	5 min	Quickly go over the answers to the worksheet. Assign homework (similar problems) and explain that it will be checked without presentations.

Assessment

• Monitor student understanding through guided practice.
• Review completed practice worksheets to assess individual understanding without requiring students to present their work in front of the class.

Homework

• Provide a homework assignment that includes 10 problems on adding and subtracting positive and negative integers to reinforce learned concepts.

National Curriculum Alignment

• This lesson aligns with the Common Core Standards for Mathematics, specifically focusing on Number and Operations in Base Ten and extending to rational numbers.

Teacher Notes

• Prepare number line visuals in advance.
• Ensure that students are able to practice problems that are varied in difficulty.
• Be ready to clarify common misconceptions, especially related to subtracting negative numbers.

Lesson script