Lesson: Creating a Stem and Leaf Plot
6DASP.1 – Describe and compare data sets using the concepts of median, mean, mode , maximum, and range.
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
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?
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.
|CW/HW Create Stem Leaf Classwork||