Lesson Plan | Active Learning | Organic Functions: Amine

Assumptions: This Active Lesson Plan assumes: a 100-minute class, prior student study with both the Book and the start of Project development, and that only one activity (among the three suggested) will be chosen to be conducted during the class, as each activity is designed to take up a significant portion of the available time.

Objectives

Duration: (5 minutes)

The stage of defining objectives is crucial to guide both the teacher and the students on the focus of the lesson. By clearly establishing what is expected to be achieved, students can direct their efforts for prior study and classroom participation more effectively. This section also serves to align expectations and ensure that all involved are aware of the desired learning outcomes.

Main Objectives:

1. Empower students to correctly name amines using IUPAC nomenclature, distinguishing them from other compounds such as methylamine and ethylamine.

2. Develop the ability to recognize and identify the molecular structure of amines, relating them to their nomenclature.

Side Objectives:

1. Encourage the practical application of theoretical knowledge about organic functions through examples and interactive exercises.

Introduction

Duration: (20 - 25 minutes)

The introduction serves to engage students with the content they studied previously, contextualizing the importance of amines and preparing the ground for the practical application of knowledge. The proposed problem situations encourage students to think critically and apply their knowledge, while the contextualization highlights the relevance of amines in the real world, motivating students through concrete examples of the application of theoretical content.

Problem-Based Situations

1. Imagine you are working in a laboratory and need to identify some unknown substances. Among them, you have amines and other organic compounds. How would you use IUPAC nomenclature to clearly distinguish the amines from the other compounds?

2. Consider that a perfume manufacturer wishes to create a new fragrance. He knows that amines are essential for many existing fragrances. How could he use his knowledge of amine nomenclature to select the correct components for his fragrance?

Contextualization

Amines are not only essential for biological processes, such as the formation of neurotransmitters and hormones, but also have practical applications in everyday life, such as in perfumery and in the production of dyes and plastics. Their study not only enriches the understanding of organic chemistry but also demonstrates their relevance in modern sciences and industry. Additionally, curiosities such as the historical use of amines in the manufacture of explosives during World War I can spark students' interest and show how science is interconnected with history and society.

Development

Duration: (70 - 75 minutes)

The Development section is designed to allow students to practically and interactively apply the knowledge acquired about the nomenclature and structure of amines. Through playful and contextualized activities, such as solving a mystery, performing a synthesis, or preparing a science fair, students actively engage in the learning process, solidifying theoretical understanding and developing critical thinking skills, problem-solving, and communication. This stage is crucial for transforming passive knowledge into active competencies and exploring the practical applications of amines in various contexts.

Activity Suggestions

It is recommended to carry out only one of the suggested activities

Activity 1 - The Mystery of the Lost Amines

> Duration: (60 - 70 minutes)

- Objective: Apply theoretical knowledge of IUPAC nomenclature of amines to correctly identify the presence of these compounds in unknown samples, developing skills in argumentation and scientific communication.

- Description: In this activity, students will be chemical detectives needing to solve a mystery involving the identification of amines in unknown samples. Five samples will be provided, each containing a mixture of amines and other organic compounds. Students must apply their knowledge of IUPAC nomenclature to identify the amines present in each sample and distinguish between them and the other compounds.

- Instructions:

• Form groups of up to five students.

• Distribute kits containing the five unknown samples, paper, pens, and a list of possible amines and other organic compounds that may be present in the samples.

• Ask each group to name the amines present in each sample using IUPAC nomenclature.

• Each group must justify their choices based on the chemical structures observed in the samples and prior knowledge.

• At the end, each group will present their conclusions and justifications to the entire class.

Activity 2 - Amines Constructors

> Duration: (60 - 70 minutes)

- Objective: Develop practical skills in chemical synthesis and apply IUPAC nomenclature knowledge in practice, promoting teamwork and responsibility in the laboratory.

- Description: Grouped together, students will assume the role of chemists in a research laboratory who need to synthesize different amines for use in medications. Each group will receive a 'toolbox' containing common reagents and basic safety instructions. They must plan and execute the synthesis of a specific amine, employing the correct nomenclature.

- Instructions:

• Divide the class into groups of no more than five students.

• Provide each group with a 'toolbox' containing common reagents, safety equipment, and basic synthesis instructions.

• Each group chooses an amine from the provided list to synthesize.

• Students must plan the synthesis, including reagent choice and reaction sequence, and present the plan to the teacher for approval.

• After approval, students will perform the synthesis in the school laboratory, under the supervision of the teacher.

• At the end, each group will present the results of the synthesis, discussing the challenges faced and the nomenclature process used.

Activity 3 - Amines Fair

> Duration: (60 - 70 minutes)

- Objective: Promote research and presentation of information about amines, stimulating creativity and effective communication, as well as reinforcing knowledge of IUPAC nomenclature.

- Description: Transform the classroom into a science fair. Each student group will be responsible for setting up a booth that explains and demonstrates the properties and uses of amines, including real-life examples of products that contain them. Part of the challenge will be to correctly name the amines and present their molecular structures clearly and didactically.

- Instructions:

• Organize the room into stations, each representing a different 'booth'.

• Assign each group a 'booth' where they must present one aspect of amines (properties, uses, structures, etc.).

• Students must prepare a small written report, with the amines correctly named and their molecular structures represented, as well as a visual presentation at the booth.

• Allow groups to circulate around the room to visit the other booths and learn from their peers.

• Each group must also present their booth to the class, explaining the content and answering questions.

Feedback

Duration: (15 - 20 minutes)

The purpose of this stage is to consolidate student learning, allowing them to reflect on what they have learned and share their experiences and discoveries. The group discussion helps reinforce knowledge, identify gaps in understanding, and promote a deeper and more meaningful learning experience. Additionally, this step provides the teacher with direct feedback on the effectiveness of the activities and students' comprehension, guiding future teachings and interventions.

Group Discussion

Start the group discussion with a brief review of the lesson objectives, asking students what they found most challenging and interesting in the activities. Encourage each group to share their discoveries and the strategies they used to solve the proposed problems. Ask how they would apply the knowledge gained in real situations or in other areas of chemistry. This moment is essential for students to articulate their learning and for the teacher to evaluate the effectiveness of the activities carried out.

Key Questions

1. What were the main difficulties you faced when applying IUPAC nomenclature in the activities identifying amines?

2. How did understanding the molecular structure of amines help in identifying and distinguishing the compounds in unknown samples?

3. In what ways could you use the knowledge gained about amines in other chemical or practical contexts?

Conclusion

Duration: (10 - 15 minutes)

The purpose of this stage is to consolidate the knowledge acquired during the lesson, ensuring that students can clearly link theory with practice and understand the relevance of studying amines. Additionally, it aims to reinforce the applicability of the concepts studied in real situations and encourage students to continue exploring and questioning chemistry in their daily lives and future studies.

Summary

To conclude, the teacher should summarize the main points addressed about amines, reiterating the molecular structures and the specific IUPAC nomenclature for each type. The activities conducted, such as 'The Mystery of the Lost Amines' and 'Amines Constructors', should be recapped, highlighting the discoveries made by students and the skills developed.

Theory Connection

Today's lesson was meticulously planned to connect theory with practice, allowing students to directly apply theoretical knowledge in solving practical problems and simulated situations that mimic real laboratory and industry scenarios. Activities such as the synthesis of amines and identification in samples served to solidify theoretical understanding through active practice.

Closing

Finally, it is crucial to highlight the importance of amines in everyday life, from their role in vital biological processes to industrial applications, such as in perfumery and drug synthesis. Understanding these concepts not only enriches students' scientific knowledge but also demonstrates how chemistry is intrinsically linked to the world around us.