# Lesson: Creating a Stem and Leaf Plot

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### Lesson Objective

SWBAT create a stem and leaf plot.

### Lesson Plan

Standard

6DASP.1 – Describe and compare data sets using the concepts of median, mean, mode , maximum, and range.

Aim/Objective:

Key Points

SWBAT create a stem and leaf plot.

·          Stem and leaf plots is a combination of a table and graph that displays numerical data

·         Stem and leaf plots are organized by tens – which are called “stems”

·         “Leaves” represent the ones digit of a number and should be matched to the ten “leaf” on the same line

·         Stem and leaf plots help to show the shape of the data

Assessment:

1.       Michael’s math quiz scores are shown below.

88,   87,   95,   72,   78,   80,   83,   80

Which of the following is a stem-and-leaf plot that correctly shows Michael’s math scores?

A.

 Math Quiz Scores 7 2  8 8 0  0  3  7  8 9 5

Key: 8|5 represents 85

B.

 Math Quiz Scores 8 8  7  0  3  0 9 5 7 2  8

Key: 8|5 represents 85

C.

 Math Quiz Scores 7 2  8 8 0    3  7  8 9 5

Key: 8|5 represents 85

D.

 Math Quiz Scores 9 5 7 2  8 8 0  0  3  7  8

Key: 8|5 represents 85

Warm Up: (5 mins)

·

Opening (5 mins)

·         Show students different samples of displays for graphs from a newspaper.

·         Think-Pair-Share: Ask students why they think people use graphs to display data?  Do you think that certain graphs are better for certain types of data?

Intro/Direct Instruction (10 mins)

·         Today we are going to learn about a certain type of graph called a stem and leaf plot.

·         Stem and leaf plots are a way to display numerical data in order.

·          It’s called a stem and leaf because it has stems and leafs (stems are digits to the left of line/leafs are digits to the right of the line) guide

·         Model two examples of creating stem and leaf plots using data.

·         Enforce that students include a key with their work.

o    Step 1- identify the min and max;

o    step 2 – arrange the numbers in order from least to greatest

o    step 3 – write the stems using the data arranged in order

o    step 4 - write the leafs in numerical order

o    step 5 – create the key (____ represents ____) and title

Guided Practice (10 mins)

·         Students will work in small groups to create a stem and leaf plot

·         Teacher will guide students through the process – asking appropriate questions to the whole group and students will create the stem and leaf plot, one part at a time.

o    What is the first thing we need to do? (identify the minimum and maximum)

o    What should we do next? (order the data)

o    Who can tell me the next step? (write the stems)

o    Now that we have the stems, what should we do next? (write the leaves for each stem)

o    In order to make sure that people who read our graphs know what it’s about, we need to remember to….(write the title, make a key)

Independent Practice (15mins)

·         Students complete worksheet – teacher circulates to monitor understanding/practice – or pull a small group of students who struggled during the guided practice

Closing (5 mins)

·         Review Key Points for the students.

·         Ask students to “turn and talk” to classmates on what the steps are to creating a stem and leaf plot

·         Give Exit Ticket for students to complete.

### Lesson Resources

 CW/HW Create Stem Leaf   Classwork 2,903