Lesson Plan for Junior Secondary 3 - Mathematics - Measure Of Central Tendency

**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.