Objectives (5 - 7 minutes)

1. Understand the concept of electromagnetic waves and their importance in everyday life, identifying practical examples of their use.
2. Differentiate electromagnetic waves from other forms of waves, such as sound waves.
3. Recognize the position of electromagnetic waves in the electromagnetic spectrum, identifying their main characteristics.

Secondary objectives:

• Stimulate critical and investigative thinking regarding the presence and use of electromagnetic waves in daily life.
• Promote group discussion, collaborative work, and autonomous research as learning methodologies.
• Develop oral and written communication skills through the presentation of research and discussions in the classroom.

Introduction (10 - 15 minutes)

1. Review of previous concepts: The teacher should start the class by reviewing the concepts of waves that were previously studied. It is important to review terms such as frequency, amplitude, wavelength, and propagation speed. This review can be done through targeted questions to the students or through a quick slide presentation. (3 - 5 minutes)

2. Problem situation: Next, the teacher should propose two problem situations to arouse students' curiosity and introduce the theme of the class. The first situation could be: "How is it possible for a TV remote control to work without wires?" The second situation could be: "Why can we hear a radio station clearly on a radio, but we can't see that same radio station?" (2 - 3 minutes)

3. Contextualization: The teacher should then contextualize the importance of studying electromagnetic waves, explaining that they are present in many technologies we use in our daily lives, such as cell phones, radios, televisions, microwaves, among others. In addition, electromagnetic waves are the basis of important studies, such as astronomy and medicine. (2 - 3 minutes)

4. Capturing students' attention: To spark students' interest, the teacher can share some curiosities about electromagnetic waves. For example, they can mention that radio waves and microwaves are used not only for communication but also for cooking food in a microwave oven. Another interesting curiosity is that electromagnetic waves propagate in a vacuum, meaning they do not need a material medium to move, which differentiates them from sound waves. (2 - 3 minutes)

Development (20 - 25 minutes)

1. Activity 1: "Electromagnetic Waves in Practice" (10 - 12 minutes)

   • Description: The teacher should divide the class into groups of up to 5 students and provide each group with a set of materials, which may include magnets, a compass, a radio, a microwave, a remote control, a light bulb, aluminum foil, among others. Each group should explore the materials, observe their characteristics, and discuss how they are related to the concept of electromagnetic waves. Students should write down their observations and conclusions in a notebook.
   • Steps:
     1. Instruct students to handle the materials with care and observe their characteristics attentively.
     2. Ask the groups to discuss and write down their observations.
     3. After the observation, the groups should share their conclusions with the class.

2. Activity 2: "The Electromagnetic Spectrum in Motion" (10 - 12 minutes)

   • Description: Still in groups, students will receive cardboard, colored pens, and a list of different types of electromagnetic waves (radio, microwave, infrared, visible light, ultraviolet, X-rays, gamma rays). Each group should draw the electromagnetic spectrum on their cardboard, representing each type of wave with different colors. Then, students should research and discuss examples of the application of each type of wave in daily life and science. For example, for radio waves, they can mention the transmission of radio and television programs; for visible light, they can mention human vision. Conclusions should be shared with the class at the end of the activity.
   • Steps:
     1. Clearly explain what the electromagnetic spectrum is, its parts, and the position of electromagnetic waves in it.
     2. Instruct students to draw the electromagnetic spectrum on their cardboard, each type of wave with a different color.
     3. Ask students to research and discuss examples of the application of each type of wave in daily life and science.
     4. Share the conclusions with the class.

3. Activity 3: "Debate: Electromagnetic Waves and Society" (5 - 8 minutes)

   • Description: The class will be divided into two groups: one in favor and one against the use of electromagnetic waves in society. Each group should prepare arguments to defend their point of view. Arguments may include health issues, privacy, convenience, among others. After preparation, the groups should present their arguments, and there will be an open discussion moment for all students. The teacher should act as a mediator to ensure that the debate takes place in a respectful and constructive manner.
   • Steps:
     1. Organize the class into two groups, one in favor and one against the use of electromagnetic waves in society.
     2. Instruct the groups to prepare their arguments.
     3. Conduct the presentations and open the debate.
     4. Mediate the debate, ensuring that all students have the opportunity to express their opinions respectfully.

Return (10 - 12 minutes)

1. Group Discussion (3 - 4 minutes)

   • The teacher should invite each group to briefly share their conclusions or solutions found during the group activities. Each group will have a maximum of 3 minutes to present their observations, conclusions, and arguments.
   • During the presentations, the teacher should encourage other groups to ask questions or make comments, thus promoting a discussion and exchange of ideas environment.

2. Connection with Theory (3 - 4 minutes)

   • After the group presentations, the teacher should provide a brief summary, connecting the students' observations and conclusions with the theory presented at the beginning of the class.
   • The teacher should highlight how the practical activities helped consolidate the concept of electromagnetic waves and the understanding of the electromagnetic spectrum.

3. Individual Reflection (2 - 3 minutes)

   • The teacher should propose a moment of individual reflection, where students will have a minute to think about the answers to the following questions:
     1. What was the most important concept learned today?
     2. What questions have not been answered yet?
   • After the minute of reflection, the teacher can ask some students to share their answers with the class, promoting a collaborative learning environment.

4. Feedback and Closure (2 - 3 minutes)

   • Finally, the teacher should provide general feedback on the class participation and understanding of the content.
   • The teacher can also clarify any doubts that may have arisen during the activities or discussions.
   • To end the class, the teacher should give a brief introduction to the next topic to be studied, reinforcing the importance of the content learned for the understanding of this new subject.

Conclusion (5 - 7 minutes)

1. Summary and Recapitulation (2 - 3 minutes)

   • The teacher should start the Conclusion by summarizing the main points covered during the class. This recapitulation can be done through a slide presentation, where the teacher highlights the most important concepts, the observations made by students during the practical activities, and the conclusions of the debate.
   • It is important for the teacher to reinforce the difference between electromagnetic waves and other forms of waves, such as sound waves, and the position of electromagnetic waves in the electromagnetic spectrum.

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

   • Next, the teacher should explain how the class connected theory, practice, and knowledge applications. The teacher can emphasize how the practical activities helped solidify the theoretical concepts and understand the importance of electromagnetic waves in our daily lives.
   • The teacher can also emphasize how the debate allowed students to explore different perspectives and develop argumentation and critical thinking skills.

3. Additional Materials (1 minute)

   • The teacher should suggest additional materials for students who wish to deepen their knowledge on the subject. These materials may include books, articles, educational videos, science websites, among others. For example, the teacher may suggest that students watch an explanatory video about electromagnetic waves or read an article that explores future applications of this technology.

4. Relevance of the Subject (1 minute)

   • To conclude, the teacher should reinforce the importance of studying electromagnetic waves, highlighting how they are present in various technologies we use in our daily lives, from the TV remote control to wireless communication networks. In addition, the teacher can mention how electromagnetic waves are fundamental in various fields of science, such as astronomy and medicine.
   • The teacher should encourage students to continue exploring the world of electromagnetic waves and to realize the influence of this technology in their lives.