##### Teaching Phase: How will the teacher present the concept or skill to students?

Continuing with the attached PowerPoint after the warm-up, the teacher will:

1. Introduce normal curve concept by stating that many real-life data sets have distributions that are approximately symmetric and bell shaped.

2. Present some examples that represent a normal distribution data. (tree heights or most natural heights, life spans of a fish or any life span of a group, hours that 60 watt light bulbs last, etc.)

3. Use the frequency table to show students that data will approximate a bell shape graph.

4. Introduce the Empirical Rule and explain how valuable the standard deviation is as a measure of variation.

5. Show how to interpret standard deviation and how to find percentages of data using Empirical Rule.

6. After this explanation, the teacher should present attached activity to students. This activity involves collecting heights of students in the class.

7. After data collection the teacher should have students record that information on a histogram. (The teacher could give the students the standard deviation if they don't have time to find it or allow them technology to calculate it.) With this graph, students should be able to make conclusions about their heights and if the data appears normal. If it doesn't appear normal the teachers should tell the students to assume normality to practice using the Empirical Rule. The teacher will ask students what they know about their personal height and where do they fall on the bell curve. Discussion should occur to the accuracy of these calculations since it is not normal and that we can only use these as approximations.

8. Continue to the Independent Practice worksheet, attached. See the write-up below.

9. Distribute the homework worksheet, attached. See the write-up in the summative assessment section.