**Lesson Plan: Basic Tech – Junior Secondary 1**
**Topic:** Properties of Materials (Rubber and Plastic)
**Duration:** 40 minutes
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### **Objectives:**
- Identify and understand the basic properties of rubber and plastic.
- Differentiate between rubber and plastic based on their properties.
- Understand the practical applications of rubber and plastic.
### **Materials:**
- Samples of rubber (e.g., rubber bands, erasers)
- Samples of plastic (e.g., plastic bottles, plastic bags)
- Whiteboard and markers
- Projector and computer for multimedia presentation
- Worksheets and pencils
- Scissors and rulers
---
### **Procedure:**
#### **Introduction (5 minutes):**
1. **Greet the Students:**
- Welcome students to the class and briefly introduce the topic.
2. **Warm-Up Activity:**
- Show various daily-use items made of rubber and plastic to spark interest.
- Ask students to identify these items and describe their observations.
3. **Set Learning Goals:**
- Explain the objectives of the lesson.
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#### **Presentation (15 minutes):**
1. **Multimedia Presentation:**
- Use a slideshow to explain the properties of rubber and plastic.
- **Rubber:**
- Elasticity
- Insulating properties
- Water resistance
- **Plastic:**
- Malleability
- Durability
- Lightweight
- Highlight differences and similarities with images and short videos.
2. **Class Discussion:**
- Ask students how they think these properties might affect how materials are used.
- Encourage students to provide examples of items made from rubber and plastic, discussing why those materials are suitable for each application.
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#### **Activity (15 minutes):**
1. **Hands-On Exploration:**
- Distribute samples of rubber and plastic to each group of students.
- Provide worksheets with questions and tasks:
- Observe and list properties (e.g., Is it stretchy? Is it rigid?)
- Test elasticity by stretching rubber bands.
- Test malleability by trying to bend or reshape plastic objects.
- Compare and contrast the samples on their worksheets.
2. **Group Work:**
- Have students work in small groups to discuss their findings and fill out their worksheets.
- Walk around the classroom, providing guidance and answering questions.
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#### **Conclusion (5 minutes):**
1. **Review and Reflect:**
- Ask each group to share one interesting fact they discovered about rubber and plastic.
- Summarize the key points discussed during the lesson.
2. **Q&A Session:**
- Open the floor for any questions from the students.
- Clarify any misunderstandings and reinforce learning objectives.
3. **Homework Assignment:**
- Assign students to find and bring an object from home made of rubber and another made of plastic for the next class. They should note down the properties and practical uses of each object.
---
### **Assessment:**
- Informal assessment based on participation in class discussions and group activities.
- Review of worksheets to check understanding of the properties of rubber and plastic.
- Observation of students' ability to differentiate between materials based on their properties.
---
### **Extension:**
- For advanced students, introduce the concept of recycling and environmental impact of rubber and plastic.
- Discuss biodegradable alternatives and innovations in material science.
---
### **Closing:**
- Thank students for their participation.
- Remind them of the objectives achieved and homework due next class.
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**Note:** Ensure safety when conducting hands-on activities, especially with younger students. Supervise their use of scissors and other instruments to avoid accidents.