**Grade Level:** 3rd Grade
**Subject:** Mathematics
**Topic:** Area and Perimeter
**Duration:** 1 hour
### **Objectives:**
1. Students will understand the concepts of area and perimeter.
2. Students will be able to measure and calculate the perimeter of various shapes.
3. Students will be able to measure and calculate the area of rectangles.
### **Materials:**
- Grid paper
- Rulers
- Colored pencils
- Pre-cut shapes (squares, rectangles)
- Whiteboard and markers
- Worksheets with different shapes for practice
- Smartboard/Projector (optional for digital demonstration)
### **Common Core Standards:**
CCSS.MATH.CONTENT.3.MD.D.8
- Solve real-world and mathematical problems involving perimeters of polygons.
### **Preparation:**
1. Pre-cut various shapes for hands-on activity.
2. Prepare worksheets with shapes for area and perimeter calculations.
3. Set up the whiteboard with examples of shapes and their measurements.
### **Lesson Plan:**
**1. Introduction (10 minutes):**
- Begin with a brief discussion about what area and perimeter mean.
- Perimeter: The distance around the outside of a shape.
- Area: The amount of space inside a shape.
- Show examples on the whiteboard.
- Ask students if they can think of places where they see perimeters or areas in real life (e.g., fencing a yard, carpeting a room).
**2. Direct Instruction (15 minutes):**
- Explain how to calculate the perimeter of a rectangle:
- Add the lengths of all four sides.
- Formula: Perimeter = 2 * (Length + Width)
- Go through a couple of examples on the whiteboard.
- Explain how to calculate the area of a rectangle:
- Multiply the length by the width.
- Formula: Area = Length * Width
- Demonstrate with a few examples on the whiteboard.
**3. Guided Practice (15 minutes):**
- Distribute grid paper and rulers to each student.
- Ask students to draw rectangles of different sizes on the grid paper.
- Have students measure the length and width and then calculate the perimeter and area of each rectangle.
- Circulate around the room to assist and check for understanding.
**4. Hands-On Activity (10 minutes):**
- Distribute pre-cut shapes (squares and rectangles) to small groups of students.
- Ask students to measure the sides using rulers and calculate the perimeter and area.
- Have students color the shapes and write down their calculations.
- Ask each group to share one example with the class.
**5. Independent Practice (7 minutes):**
- Hand out worksheets with different shapes.
- Ask students to calculate the perimeter and area of each shape.
- Provide assistance as needed.
**6. Review and Wrap Up (3 minutes):**
- Review the key points of the lesson.
- Ask a few students to share their answers from the independent practice.
- Discuss any mistakes or misunderstandings.
**7. Assessment:**
- Collect worksheets to check for accuracy and understanding.
- Provide feedback and additional practice if necessary.
### **Extension (Optional):**
- For advanced students, introduce the concept of finding the area of irregular shapes by breaking them into smaller, manageable rectangles.
- Use technology by incorporating an interactive online game focused on perimeter and area calculations.
### **Homework:**
- Assign a worksheet with additional problems on perimeter and area for reinforcement.
**Note:** Adjust the pacing and complexity of the lesson based on the students' understanding and needs.