Lesson Plan for Primary 3 - Mathematics - Mass/capacity

# Lesson Plan: Understanding Mass & Capacity ## Grade: Primary 3 ### Topic: Mass/Capacity --- ### Objectives: 1. **Identify** different units of mass (grams, kilograms) and capacity (milliliters, liters). 2. **Measure** and **compare** the mass and capacity of various objects. 3. **Develop** an understanding of the practical uses of measuring mass and capacity in everyday life. ### Materials Needed: - Digital scale - Measuring cups/jugs - A variety of objects with different weights (e.g., pencils, erasers, books) - Different containers (e.g., cups, bottles, jugs) - Water - Sand - Worksheets with related problems - Interactive whiteboard or projector ### Time: 90 minutes --- ### Lesson Outline: #### 1. Introduction (10 minutes) - **Greeting and Setting the Scene:** "Good morning, students! Today, we're going to learn about mass and capacity. These are important concepts that help us understand how heavy things are and how much they can hold." - **Discuss Real-life Examples:** Ask, "Can anyone tell me when you might need to know how heavy something is or how much a container can hold?" #### 2. Explanation and Demonstration (15 minutes) - **Define Mass and Units:** - **Mass**: The amount of matter in an object. Measured in grams (g) and kilograms (kg). - **Examples:** Show a digital scale. Measure and show the weight of a pencil, eraser, and a book. - **Define Capacity and Units:** - **Capacity**: The amount of liquid a container can hold. Measured in milliliters (ml) and liters (L). - **Examples:** Show different containers and measure the amount of water each can hold using measuring cups/jugs. #### 3. Interactive Activity - Measuring and Comparing Mass (20 minutes) - **Group Activity:** - Split the class into small groups. - Provide each group with a digital scale and a set of objects. - **Task:** Measure the mass of each object and record it on the provided worksheet. - **Discussion:** “Which object is the heaviest/lightest? How do you know?” #### 4. Interactive Activity - Measuring and Comparing Capacity (20 minutes) - **Group Activity:** - Give each group different containers and measuring cups/jugs. - **Task:** Measure and compare the capacity of each container with water or sand and record it. - **Discussion:** “Which container holds the most/least? How do you know?” #### 5. Individual Practice (15 minutes) - **Worksheet Activity:** Distribute worksheets with problems related to mass and capacity. - Questions might include: "How much heavier is object A than object B?" or "Which container has greater capacity, Container X or Y?" - Circulate and assist students as needed. #### 6. Recap and Reflection (5 minutes) - **Review Key Points:** Reiterate the definitions and key units of mass and capacity. - **Q&A Session:** "What did you learn about mass? What did you learn about capacity?" - **Real-life Application:** Briefly discuss how they might use these skills at home or in the community. #### 7. Closing (5 minutes) - **Summarize the Lesson:** "Today, we learned about mass and capacity, and how to measure and compare them." - **Preview the Next Lesson:** "Next time, we'll explore how to solve problems involving mass and capacity in different scenarios." --- ### Assessment: - Observe students' engagement and participation during group activities. - Review accuracy and completeness of the worksheets. - Ask questions during the recap session to gauge understanding. ### Homework: - **Worksheet Exercise:** Provide additional problems for the students to practice at home. - **Practical Activity:** Ask students to measure the mass of three objects at home and estimate the capacity of two containers. --- This lesson plan provides a balanced mix of theoretical knowledge, practical activities, and individual practice to help Primary 3 students understand mass and capacity.