Title: Exploring Temperature and Thermometers: Solving Real-Life Problems with Negative Numbers Grade Level: Year 4 (Primary)

Objective: - Students will be able to understand and use negative numbers in the context of temperature. - Students will be able to solve real-life problems involving temperature using thermometers and negative numbers.

Materials: - Thermometers (real or digital) - Worksheets (links provided below) - Whiteboard or chart paper - Markers - Pencils - Erasers

Lesson Plan:

1. Introduction (5 minutes):
   • Begin the lesson by asking students if they have ever seen a thermometer and what it is used for.
   • Explain that thermometers are used to measure temperature, which is a way to describe how hot or cold something is.
   • Introduce the concept of negative numbers and explain that they can be used to represent temperatures below zero.
2. Understanding Negative Numbers (10 minutes):
   • Write a number line on the whiteboard or chart paper, starting from -10 to +10.
   • Ask students to identify where zero is on the number line and explain that numbers to the left of zero are negative, while numbers to the right are positive.
   • Engage students in a discussion about real-life examples of negative numbers, such as below zero temperatures or debts.
3. Reading and Using Thermometers (15 minutes):
   • Distribute thermometers to each student or display a digital thermometer on the board.
   • Demonstrate how to read a thermometer, emphasizing the use of negative numbers for temperatures below zero.
   • Provide examples of different temperatures and ask students to read and identify them on their thermometers.
   • Allow students to practice reading temperatures on their own or in pairs.
4. Solving Real-Life Problems (20 minutes):
   • Introduce a series of real-life problems involving temperature and negative numbers.
   • Display each problem on the board and encourage students to think about how they can use negative numbers and thermometers to solve them.
   • Discuss and solve each problem as a class, allowing students to share their strategies and solutions.
   • Emphasize the importance of understanding negative numbers in solving temperature-related problems.
5. Plenary (5 minutes):
   • Summarize the key concepts covered in the lesson, including the use of negative numbers and thermometers to solve real-life problems.
   • Ask students to share one thing they learned or found interesting during the lesson.

Worksheets: 1. Worksheet 1: Reading Thermometers (Link: [insert link]) 2. Worksheet 2: Solving Temperature Problems (Link: [insert link])

Note: The worksheets can be customized based on the specific needs and curriculum of your school or region.

Assessment: - Monitor students’ participation and engagement during class discussions and activities. - Review completed worksheets to assess students’ understanding of reading thermometers and solving temperature problems using negative numbers. - Provide feedback and support to students as needed.

Extensions: - Encourage students to explore temperature-related concepts further by conducting experiments, such as measuring the temperature of different objects or environments. - Integrate technology by using online interactive thermometers or temperature conversion tools to reinforce learning.

References: - Worksheet 1: Reading Thermometers. Retrieved from [insert link] - Worksheet 2: Solving Temperature Problems. Retrieved from [insert link]