Objectives (5 - 7 minutes)

1. Develop students' ability to solve addition and subtraction problems in a contextualized and meaningful way, through everyday problem situations.

2. Foster students' ability to analyze and interpret the proposed problems, identifying relevant information and the necessary mathematical operations to solve them.

3. Stimulate teamwork and effective communication among students, promoting discussions and idea exchanges for solving the proposed problems.

Introduction (10 - 15 minutes)

1. The teacher starts the lesson by reviewing the concepts of addition and subtraction, using simple and clear examples, such as counting objects in a box (addition) and removing some of these objects (subtraction). It is important to ensure that all students have a basic understanding of these concepts before moving on.

2. Next, the teacher proposes two problem situations involving addition and subtraction, but that are contextualized and meaningful to the students. For example, 'João has 5 candies and receives 3 more. How many candies does he have now?' and 'Maria had 8 candies, but ate 2. How many candies does she have now?' Students are encouraged to think about these questions and discuss possible solutions in groups.

3. The teacher then introduces the idea that addition and subtraction problems are not always so simple, and that often we need to solve more complex problems in our daily lives. To illustrate this, the teacher can present some more challenging problem situations, such as 'Pedro had 10 dollars and bought a toy that cost 5 dollars. How much does he have now?' and 'Ana had 7 candies and gave 3 to her brother. How many candies does she have now?'

4. Finally, the teacher contextualizes the importance of correctly solving addition and subtraction problems, explaining that these skills are essential for many activities in our daily lives, such as shopping, sharing sweets with friends, among others. The teacher can also mention some professions in which mathematics and problem-solving are very important, such as engineers, scientists, and architects, to motivate the students.

Development (20 - 25 minutes)

1. 'Playing with Addition and Subtraction' (10 - 12 minutes)

   • The teacher divides the class into small groups (4 to 5 students each) and gives each group a box with various objects (buttons, building blocks, colored pencils, among others).
   • Each group must take out a specific number of objects from the box (for example, 7 buttons) and then perform an addition or subtraction operation with these objects.
   • After performing the operation, students should summarize what they did in a short story involving the class characters (for example, 'João had 7 buttons, but Maria gave him 4 buttons. Now João has...') and illustrate the story on a piece of paper.
   • This game allows students to experience and visualize addition and subtraction in a playful and concrete way, which can facilitate the understanding of these operations.

2. 'Math Treasure Hunt' (10 - 13 minutes)

   • The teacher spreads cards around the classroom, each containing an addition or subtraction problem. The problems should vary in difficulty so that all students can participate.
   • Students are divided into the same groups and each group receives a recording sheet. They must find the cards and solve the problems, writing down the answers on the recording sheet.
   • The group that finishes first can try to help other groups with the more difficult problems. The teacher should walk around the room to clarify doubts and offer guidance if necessary.
   • At the end, the teacher corrects the answers and the groups that got more problems right receive a small prize, such as stickers or extra points for the month's game (if applicable).

Both activities are highly interactive and involve students actively in solving addition and subtraction problems. In addition, these group activities promote teamwork, communication, and mutual respect, important social skills for students' development. The teacher should encourage everyone's participation and create a fun and welcoming learning environment.

Feedback (10 - 15 minutes)

1. Group Discussion (5 - 7 minutes)

   • The teacher gathers all students and promotes a group discussion about the solutions found by different groups in the activities 'Playing with Addition and Subtraction' and 'Math Treasure Hunt'.
   • During the discussion, the teacher should highlight the different strategies used by the groups to solve the problems, emphasizing that there are several correct ways to solve the same mathematical problem.
   • The teacher should also take this opportunity to correct any mistakes or misunderstandings that may have arisen during the activities, reinforcing the correct concepts of addition and subtraction.

2. Connection to Theory (3 - 5 minutes)

   • The teacher then guides the students to make the connection between the practical activities carried out and the theory presented at the beginning of the lesson.
   • The teacher can ask, for example, 'How did the activity 'Playing with Addition and Subtraction' help you better understand what addition and subtraction are?' or 'How does the 'Math Treasure Hunt' activity relate to solving addition and subtraction problems?'.
   • The goal of this moment is to consolidate learning, showing students that mathematics is not just a series of abstract rules, but a useful tool for solving everyday problems.

3. Final Reflection (2 - 3 minutes)

   • To conclude the lesson, the teacher suggests that students reflect for a minute on what they learned in class.
   • The teacher can ask two simple questions to guide students' reflection: 'What was easier for you today: addition or subtraction?' and 'What do you think you still need to practice more: addition or subtraction?'.
   • Students can briefly share their answers with the class, if they feel comfortable, or just reflect silently.
   • The goal of this reflection is to help students become more aware of their own abilities and learning needs, encouraging them to engage more actively and autonomously in their learning process.

Conclusion (5 - 10 minutes)

1. Lesson Summary (2 - 3 minutes)

   • The teacher summarizes the main points covered during the lesson, reviewing the definition of addition and subtraction, and emphasizing the importance of correctly solving addition and subtraction problems in our daily lives.
   • The teacher can briefly recap the problem-solving strategies discussed during the practical activities, reinforcing the idea that there are several correct ways to solve the same mathematical problem.
   • The teacher can also revisit the problem situations from the beginning of the lesson and solve them together with the students to ensure that everyone has understood the solutions correctly.

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

   • The teacher highlights how the lesson integrated theory (addition and subtraction concepts) with practice (solving addition and subtraction problems).
   • The teacher emphasizes that by carrying out practical and contextualized activities, students were able to not only better understand theoretical concepts, but also apply them in a meaningful and relevant way.

3. Extra Materials (1 - 2 minutes)

   • The teacher suggests some extra materials for students who wish to deepen their knowledge in addition and subtraction. This may include online games, educational apps, children's math books, etc.
   • For example, the teacher may recommend the use of interactive addition and subtraction games on the school's digital platform, or suggest that students explore the school library for interesting math books.
   • The goal of these extra materials is to provide students with the opportunity to continue learning and practicing addition and subtraction in a fun and engaging way, even outside the classroom.

4. Importance of Mathematics (1 - 2 minutes)

   • Finally, the teacher concludes the lesson by reinforcing the importance of mathematics, and more specifically, of addition and subtraction in our daily lives.
   • The teacher may mention some everyday situations where we need to use addition and subtraction, such as counting money, measuring ingredients for a recipe, calculating time, among others.
   • The teacher can also highlight how the problem-solving skills developed in the lesson are important not only for mathematics, but also for other subjects and for life in general.
   • The goal of this final part of the lesson is to help students realize the relevance and applicability of what they have learned, encouraging them to become more interested and involved in mathematics.