Objectives (5 - 7 minutes)

1. Understand the concept of potential difference: Students should be able to define the term 'potential difference' and understand how it is measured. They should be able to apply this concept in practical contexts of simple electrical circuits.

2. Identify the factors that influence the potential difference: Students should be able to identify the factors that influence the potential difference in an electrical circuit. They should understand how the potential difference is affected by the electric current and the circuit's resistance.

3. Solve problems involving potential difference: Students should be able to apply relevant formulas to solve problems involving potential difference. They should be able to determine the potential difference in a circuit, given the current and resistance, or the current and power.

   Secondary Objectives:

   • Develop problem-solving skills: In addition to acquiring knowledge about potential difference, students should be able to apply this knowledge to solve problems. This will help develop their critical thinking and problem-solving skills.

   • Promote practical understanding of electricity: By learning about potential difference, students should be able to relate this concept to practical applications of electricity in their daily lives. This will help make the content more relevant and interesting to them.

Introduction (10 - 15 minutes)

1. Review of previous concepts: The teacher should start the lesson by briefly reviewing the electricity concepts that were learned in previous classes. This includes defining electric current, resistance, and power. This review can be done through questions to the students, asking them to define these concepts or apply them in practical examples. (3-5 minutes)

2. Presentation of problem situations: To arouse students' interest and contextualize the subject of the lesson, the teacher can present two problem situations. The first one may involve the question: 'Why does the light bulb in an electrical circuit shine brighter when we connect more batteries in series?' The second one could be: 'Why does an electronic device burn if the voltage from the outlet is higher than indicated in the manual?' These questions will serve as a starting point for introducing the concept of potential difference. (3-5 minutes)

3. Contextualization of the importance of the subject: The teacher should then explain to the students that understanding potential difference is essential to comprehend how electricity works in our daily lives. He can mention examples of everyday situations that depend on potential difference, such as operating household appliances, lighting bulbs, and charging batteries. (2-3 minutes)

4. Introduction of the topic with curiosities and practical applications: To capture students' attention, the teacher can share some curiosities and practical applications of the theme. For example, he can mention that the highest potential difference ever recorded on Earth occurred during a storm, reaching 1 billion volts. Another curiosity is that static electricity, which we often feel when touching something metallic after walking on a carpet, is caused by a potential difference between our body and the object. (2-3 minutes)

Development (20 - 25 minutes)

1. 'Current Path' Activity (10 - 12 minutes)

   • Description: The teacher will draw a simple electrical circuit on the board with several resistances (represented by resistors) in series. Each resistor will have a different color to facilitate identification. Students will be divided into groups of 3 or 4 and will receive a set of batteries and wires of different colors.
   • Objective: The objective is for students to visually understand how the potential difference is distributed in a series circuit.
   • Step by step:
     1. The teacher will explain how to connect the batteries and resistors to form the series circuit.
     2. Then, each group should assemble the circuit according to the instructions.
     3. The teacher will then ask a student from each group to connect the multimeter to the circuit to measure the potential difference.
     4. After measuring the potential difference, the student will pass the multimeter to the next student, and so on, until the potential difference in each resistor has been measured.
     5. Students will record the measured values and discuss their findings in the group.

2. 'Resistance and Potential Difference' Activity (10 - 12 minutes)

   • Description: In this activity, students will investigate how resistance affects the potential difference in a parallel circuit.
   • Objective: The objective is for students to understand how resistance and potential difference are related in a parallel circuit.
   • Step by step:
     1. The teacher will draw another simple circuit on the board, this time with several resistances in parallel.
     2. Each group will receive a new set of batteries and wires of different colors.
     3. Students should assemble the parallel circuit according to the teacher's instructions.
     4. The teacher will ask a student from each group to measure the potential difference in each resistor.
     5. Students will record the measured values and discuss their findings in the group.

3. 'Potential Difference Problems' Activity (5 - 7 minutes)

   • Description: In this activity, students will solve problems involving potential difference.
   • Objective: The objective is for students to apply the concepts they have learned to solve practical problems.
   • Step by step:
     1. The teacher will provide students with a series of problems involving potential difference.
     2. Students will work in groups to solve the problems, applying the formulas and concepts they have learned.
     3. The teacher will circulate around the room, providing guidance and clarifying doubts as necessary.
     4. After a certain time, each group will present their solutions to the class, and the teacher will provide feedback and clarify any misunderstandings.

These practical activities will allow students to explore the concept of potential difference interactively and engagingly. Additionally, they will have the opportunity to develop their problem-solving skills and teamwork.

Return (8 - 10 minutes)

1. Group Discussion (3 - 4 minutes)

   • Description: The teacher gathers all students and leads a group discussion on the solutions or conclusions found by each group during the activities. Each group will have a maximum of 2 minutes to share their main discoveries or difficulties.
   • Objective: The objective is for students to learn from each other, understanding different approaches and perspectives to problem-solving. This also helps reinforce the understanding of the potential difference concept, as they will have the opportunity to hear and discuss various applications of the concept.
   • Step by step:
     1. The teacher asks each group to share their main discoveries or difficulties during the activities.
     2. While the groups share, the teacher asks questions to stimulate reflection and deepen the students' understanding.
     3. After each presentation, the teacher and other students have the opportunity to make comments or ask questions to clarify any misunderstandings.

2. Connection with Theory (2 - 3 minutes)

   • Description: After the group discussion, the teacher revisits the theoretical concepts discussed at the beginning of the lesson and connects them with the practical findings of the students. This can be done through questions and answers, or the teacher can directly explain how the theory applies to the practical situations the students explored.
   • Objective: The objective is for students to see the relevance and practical application of the theoretical concepts they are learning. This helps make the material more meaningful and interesting to them.
   • Step by step:
     1. The teacher briefly reviews the main theoretical concepts related to potential difference.
     2. He then asks students to explain how these concepts apply to the practical situations they explored during the activities.
     3. The teacher may need to provide some guidance or clarifications to help students make these connections.

3. Individual Reflection (2 - 3 minutes)

   • Description: The teacher suggests that students reflect individually on what they learned during the lesson. He does this through questions that encourage students to think about the most important concepts they learned and the questions they still have. Students can write down their answers in a notebook or share them verbally with the class.
   • Objective: The objective is for students to become aware of their own learning, identifying what they understood and what they still do not fully understand. This can help them prepare for future classes or independent studies.
   • Step by step:
     1. The teacher asks questions like: 'What was the most important concept you learned today?' and 'What questions have not been answered yet?'.
     2. Students have a minute to think about their answers.
     3. The teacher may ask some students to share their answers with the class, if they are comfortable doing so.

The Return is a crucial part of the lesson, as it allows the teacher to assess the students' level of understanding and identify any areas that may need review or additional clarification. At the same time, it provides students with the opportunity to consolidate their learning and clarify any doubts they may have.

Conclusion (5 - 7 minutes)

1. Summary and Recapitulation (2 - 3 minutes)

   • Description: The teacher should summarize the main points covered during the lesson, reinforcing the definition and calculation of potential difference, as well as the factors that influence it.
   • Objective: This moment is important to help students consolidate what they have learned, recapitulating the main concepts and skills they have developed.
   • Step by step:
     1. The teacher reaffirms the definition of potential difference and the relationship between current, resistance, and power, which were the central concepts of the lesson.
     2. He recalls the formulas and methods used to calculate the potential difference in different situations.
     3. The teacher can also highlight the main discoveries and conclusions that students reached during the practical activities, reinforcing the connection between theory and practice.

2. Connection between Theory and Practice (1 - 2 minutes)

   • Description: The teacher should emphasize how the lesson connected the theory of potential difference with practice through the group activities. He should emphasize how understanding the theory allowed students to solve practical problems.
   • Objective: The objective is for students to realize the importance of theory for solving practical problems, and that practice helps reinforce the understanding of theory.
   • Step by step:
     1. The teacher can recall some examples from the practical activities and explain how the theoretical concepts were applied to solve the problems.
     2. He can also highlight how practice helped deepen the students' understanding of the theory.

3. Extra Materials (1 - 2 minutes)

   • Description: The teacher should suggest extra materials for students who wish to deepen their knowledge of potential difference. This may include books, websites, educational videos, or experiments they can perform at home.
   • Objective: The objective is for students to have the opportunity to explore more about the subject if they are interested, and to use these resources to clarify any doubts they may have.
   • Step by step:
     1. The teacher can provide a list of resources, briefly explaining what each one offers.
     2. He can also suggest some specific topics that students may want to research, based on the questions and difficulties that arose during the lesson.

4. Relevance and Applications (1 minute)

   • Description: Finally, the teacher should emphasize the importance of studying potential difference for everyday life, mentioning some of its most common applications.
   • Objective: The objective is for students to realize the relevance of what they have learned to the world around them, encouraging a continued interest in the subject.
   • Step by step:
     1. The teacher can mention some practical applications of potential difference, such as the operation of household appliances, lighting bulbs, and battery charging.
     2. He can also ask students if they can think of other everyday situations where potential difference is important, encouraging them to make connections with their own knowledge and experience.