Lesson Plan | Active Methodology | Electrical Power

Premises: This Active Lesson Plan assumes: a 100-minute class duration, prior student study both with the Book and the beginning of Project development, and that only one activity (among the three suggested) will be chosen to be carried out during the class, as each activity is designed to take up a large part of the available time.

Objective

Duration: (5 - 10 minutes)

This section is key in directing the lesson's focus, ensuring students know what's expected of them during practical activities. By setting clear and concise objectives, students will effectively connect theory with practice, enhancing their understanding and retention of knowledge. This part of the lesson also acts as a guide for upcoming activities, making sure all efforts align with the learning goals we've established.

Objective Utama:

1. Understand and apply the concepts of electric power, current, and voltage to calculate the energy consumption of electrical appliances.

2. Develop calculation and analytical skills to determine monthly energy consumption and estimate costs on a utility bill.

Objective Tambahan:

1. Encourage critical thinking and problem-solving when tackling real-world issues related to energy consumption.
2. Promote awareness around the efficient and responsible use of electricity.

Introduction

Duration: (15 - 20 minutes)

The introduction is key to engaging students, bridging their prior knowledge with the practical real-world context of the topic. The problem-based situations stimulate critical thinking about the real-life application of the concepts learned, fostering curiosity and investigation. Contextualization helps illustrate the relevance of this topic, showing its connection to the world around them and the importance of being aware of energy consumption.

Problem-Based Situation

1. Picture a family looking to cut down on their electricity bill. They want to monitor which appliances at home are using the most energy. How might they calculate the monthly energy consumption of each appliance and pinpoint those that have the largest impact on their bill?

2. A classroom project focused on energy efficiency is assigned to students. They'll need to calculate the energy consumption of all light bulbs used throughout the school. What steps should they take to start calculating this consumption and utilizing it to enhance the school's energy efficiency?

Contextualization

Grasping electric power and energy consumption is more than just an academic task; it's vital for our everyday lives. From selecting the most efficient appliances to reviewing our utility bills, understanding these concepts is essential. The progression of electrical devices over the years has led to greater energy efficiency, which is especially important in our journey towards a sustainable future. By learning how energy is consumed, we can make smarter choices that influence both our household expenses and the environment.

Development

Duration: (70 - 75 minutes)

The development phase allows students to apply electric power and energy consumption concepts in practical, real-world situations. The activities are designed to stimulate creativity, teamwork, and the application of mathematical knowledge to everyday challenges, empowering students to make informed decisions about energy use. Plus, these activities are made to be enjoyable and engaging, ensuring students remain motivated and absorb the content effectively.

Activity Suggestions

It is recommended that only one of the suggested activities be carried out

Activity 1 - Lost Watts Hunt

> Duration: (60 - 70 minutes)

- Objective: Learn how to calculate the energy consumption of appliances and create strategies for conserving energy.

- Description: In this activity, students become energy detectives, exploring various household appliances to discover which ones consume the most energy. Each group receives a list of common appliances and a table to document data on power (in watts) and daily usage time. Their goal is to calculate the daily and monthly consumption for each appliance and identify areas for improvement to enhance energy savings.

- Instructions:

• Form groups of up to 5 students.

• Distribute the list of appliances and the data recording table.

• Research or use a wattmeter to check the power for each appliance.

• Estimate the average daily usage time for each appliance.

• Calculate the daily consumption for each appliance (Power x Usage time).

• Extrapolate the data for a month and calculate the monthly consumption.

• Identify the appliances that use the most energy and suggest ways to cut down on their usage.

Activity 2 - Bill Reduction Operation

> Duration: (60 - 70 minutes)

- Objective: Apply knowledge of power and consumption to optimize energy usage in a home context, leading to cost savings.

- Description: Students are given a pretend electricity bill and various consumption profiles of different families. Their challenge is to rearrange how the appliances are used to achieve the most significant reduction in the final utility bill amount, applying the concepts of power and energy consumption learned previously.

- Instructions:

• Divide the class into groups of up to 5 students.

• Distribute copies of the electricity bill and consumption profiles.

• Analyze the data to pinpoint the main energy-consuming appliances.

• Create a new usage plan for the appliances to reduce consumption.

• Calculate the new utility bill amount based on the proposed changes.

• Present the plan and proposed savings to the class.

Activity 3 - Energy Efficiency Festival

> Duration: (60 - 70 minutes)

- Objective: Raise awareness of energy efficiency through engaging and practical presentations.

- Description: In this task, student groups are tasked with organizing an 'Energy Efficiency Festival' at the school. They’ll create booths showcasing practical ways to save energy at home, using interactive demos or simple experiments to illustrate how small changes can have a significant impact.

- Instructions:

• Form groups of up to 5 students.

• Choose an energy-saving theme for the booth (lighting, appliances, heating, etc.).

• Develop an experiment or demonstration demonstrating energy efficiency.

• Prepare materials and scripts to present to visitors during the festival.

• Set up the booth and give presentations to students from other classes or guests.

• Evaluate the festival's effectiveness in raising awareness about energy consumption.

Feedback

Duration: (10 - 15 minutes)

This part of the lesson plan is crucial for solidifying student learning, allowing them to articulate and reflect on the knowledge gained during practical activities. The group discussion fosters communication and collaboration skills, while the key questions prompt students to think critically about the application of electric power and energy consumption concepts in their everyday lives. Additionally, this discussion offers immediate feedback on their ideas, helping fine-tune and deepen their understanding of the topic.

Group Discussion

Begin the group discussion with a brief recap of the lesson’s objectives, prompting students to reflect on their learnings. Have each group share their most interesting findings and the solutions they proposed for reducing energy consumption. Encourage students to compare results from different groups and what this variation may suggest about the variables involved in energy consumption calculations. Use insightful questions to maintain an engaging and productive discussion.

Key Questions

1. Which appliances had higher energy consumption and why?

2. How can the proposed solutions be realistically implemented to reduce energy consumption?

3. What impact did reorganizing appliance usage have on the utility bill reductions in the examples you calculated?

Conclusion

Duration: (5 - 10 minutes)

The conclusion serves to solidify the learning experience, ensuring students can connect practical activities with the theoretical concepts covered, while also grasping the relevance of electric power ideas in their everyday lives. This final stage reinforces the importance of the knowledge acquired and motivates students to apply what they’ve learned in a practical, conscientious manner.

Summary

To wrap things up, we'll recap the formulas and concepts relating to electric power, current, and voltage, and how these link to calculating the energy consumption of electrical appliances. We'll reflect on the activities conducted, like 'Lost Watts Hunt' and 'Bill Reduction Operation,' which allowed students to realistically apply theory to practice, calculating energy consumption and brainstorming viable cost-reduction solutions.

Theory Connection

Throughout the lesson, we've directly connected the theory of electric power with hands-on activities that mimic real-life scenarios. By calculating appliance energy consumption and trying to reduce costs on hypothetical bills, students see how mathematical and physical concepts are relevant in their daily experiences, which helps reinforce their understanding.

Closing

In conclusion, we'll emphasize the significance of understanding electric power and energy consumption, not just for reducing household bills but also for encouraging a more aware and efficient approach to energy resources in our communities. This knowledge empowers students to make choices that positively impact both the environment and their financial well-being.