**Lesson Plan: Weight and Measurement for Primary 3**
**Subject:** Mathematics
**Grade Level:** Primary 3
**Duration:** 60 minutes
**Topic:** Weight and Measurement
**Objectives:**
1. Students will understand the concept of weight.
2. Students will be able to differentiate between heavy and light objects.
3. Students will be introduced to standard units of weight (grams and kilograms).
4. Students will practice measuring weight using a scale.
**Materials:**
- Digital or analog scales
- Various objects of different weights (e.g., apples, books, feathers, toys)
- Sets of weights (e.g., 100g, 500g, 1kg)
- Worksheets with practice problems
- Chart paper and markers
- Flashcards with common objects and their approximate weights
**Procedure:**
**Introduction (10 minutes):**
1. Begin with a quick discussion: "What do you think about when you hear the word 'weight'?" Allow students to share their thoughts.
2. Explain that weight is a measure of how heavy or light something is.
3. Show a few objects and ask students to predict which is heavier and which is lighter.
**Teaching Input (15 minutes):**
1. Demonstrate using a scale to measure the weight of a few objects.
2. Introduce standard units of weight: grams (g) and kilograms (kg). Explain that 1 kilogram = 1000 grams.
3. Show flashcards with common objects and their weights to give students a reference (e.g., a textbook is about 1 kg, an apple is about 150g).
**Guided Practice (15 minutes):**
1. Split students into small groups and provide each group with a set of objects and a scale.
2. Have each group measure and record the weight of their objects.
3. Instruct groups to arrange their objects from lightest to heaviest based on their measurements.
4. Walk around to assist and ensure students are using the scales correctly.
**Independent Practice (10 minutes):**
1. Distribute worksheets with various weight-related problems (e.g., comparing weights, simple addition of weights).
2. Allow students to complete the worksheets individually.
**Conclusion (10 minutes):**
1. Review the main concepts of the lesson: what weight is, how to measure it, and the units of grams and kilograms.
2. Ask a few students to share an interesting finding from their group work.
3. Give a few examples and ask students to classify them as light or heavy.
**Assessment:**
- Observe students during group activities to see if they are correctly measuring weights and understanding the concepts.
- Check individual worksheets for accuracy.
- Conduct a quick oral quiz asking students to estimate the weight of various classroom objects.
**Extension Activity (Optional):**
- Set up a small "market" where students can use weights to "buy" items. They must use the correct weights to match the specified weights of the items.
**Homework:**
- Ask students to find and weigh three items at home with the help of an adult, then write down the weights and bring them to the next class.
**Notes:**
- Ensure all students are engaged by rotating the objects and allowing each group to measure different items.
- Encourage students to ask questions and be curious about the weight of objects around them.