**Lesson Plan: Measure of Central Tendency**
**Grade Level: Junior Secondary 3**
**Subject: Mathematics**
**Duration: 60 minutes**
**Objective:**
- Students will understand the concepts of mean, median, and mode.
- Students will be able to calculate the mean, median, and mode of a given data set.
- Students will be able to analyze and interpret the central tendencies from given data.
**Materials:**
- Whiteboard and markers
- Projector and computer for presentation
- Handouts with data sets
- Graphing calculators
- Rulers and graph paper (optional)
**Lesson Outline:**
**Introduction (10 minutes)**
1. **Greeting and Attendance:**
- Teacher greets students and takes attendance.
2. **Hook:**
- Begin with a brief discussion: "What do you usually look for to understand the average performance in your class?" Lead into how we use central tendencies (mean, median, and mode) to analyze data.
3. **Learning Objectives:**
- Present the lesson’s objectives on the board.
**Presentation (20 minutes)**
1. **Definition and Explanation:**
- Define central tendency and explain its importance in summarizing data.
2. **Mean (Arithmetic Average):**
- Explain how to calculate the mean.
- Example: Calculate the mean of {2, 3, 6, 8, 11}. (ℴ2 + 3 + 6 + 8 + 11) / 5 = 6)
3. **Median:**
- Define the median as the middle value when data is ordered.
- Example: Median of {3, 1, 9, 5, 7}. Order: {1, 3, 5, 7, 9}. Median: 5.
- Discuss handling even-numbered data sets.
4. **Mode:**
- Define the mode as the most frequently occurring value.
- Example: Mode of {4, 4, 2, 3, 4, 5} is 4.
- Discuss situations with no mode or multiple modes.
**Activity (20 minutes)**
1. **Class Activity:**
- Students are given handouts with different data sets to calculate mean, median, and mode.
- Walk around the classroom to assist and answer questions.
2. **Group Discussion:**
- Allow students to compare their answers in small groups and discuss any discrepancies.
**Conclusion (10 minutes)**
1. **Review:**
- Summarize the key points of the lesson on the board.
- Quick questions: "What is the mean?", "How is the median found?", "What is the mode?"
2. **Q&A:**
- Open the floor for any final questions.
3. **Assessment and Homework:**
- Distribute a worksheet with similar problems for homework.
- Inform students to bring any questions they have to the next class.
**Assessment:**
- Observe students' participation during activities.
- Check accuracy of in-class calculations.
- Review and grade homework to evaluate understanding.
**Differentiation:**
- Provide advanced problems for students who finish early.
- Offer one-on-one support for students who struggle with the concepts.
**Closure:**
- Thank students for their participation.
- Remind them of the importance of understanding measures of central tendency in everyday life and various professions.
**Homework:**
- Worksheet containing 5 data sets for calculating mean, median, and mode to reinforce lesson concepts.