Overview
Students
conduct a survey to determine the class' favourite type of Halloween candy.
Candy wrappers are used to create a bar graph by type of candy. Data are
described in mathematical terms and questions are posed about the data
collected. The activity is presented as a Halloween theme but may be used at
any time of the year if students bring in pictures of their favourite treats
instead of candy wrappers.
Objectives
The goal of
this activity is to encourage students to see the need for organizing
information and to start developing the skills needed in data management.
Outcomes
conduct a survey about their favourite
Halloween candy/treat
sort candy wrappers according to specific
attributes (i.e., chocolate, gum)
organize the candy wrappers or treat
pictures on a wall chart of a bar graph by type of candy
Materials
A newsletter to be sent home a week prior
to Halloween.
Assorted candy wrappers or treat pictures
to be provided by the students.
Glue sticks or scotch tape.
Large piece of grid paper.
Coloring utensils.
Classroom
instructions
This
activity will last a whole week but you will only need two half-hour lessons to
teach the content involved. Start preparing for this activity at least one week
prior to Halloween by sending a newsletter to parents informing them of this
lesson on Data Management and encouraging them to communicate with you any concerns
they may have (see Teacher notes below). You should also mention that as part
of next week’s activities their child will be required to bring to school 1 or
2 candy wrappers a day.
Lesson One
The day
before students go out for Halloween introduce the activity by perhaps sharing
some information about your favourite Halloween treats or by telling them why
we give treats out on Halloween and where the phrase "trick or treat"
comes from. Then engage the students in a conversation by asking such questions
as:
"What is your favourite Halloween
treat Johnny?"
"How many people like ________?"
"Is there another Halloween treat you
enjoy eating?"
"How many people like this
treat?"
"Which would you say is our class’s
favourite Halloween treat?"
Write the
answers given on the board under the title "Our Favourite Halloween
Candy".
After
receiving a number of responses explain to them that asking questions about
your class's favourite Halloween candy is called a survey and that their
answers are called data. Write the words "survey" and
"data" on the board.
Continue by
asking: "How can we find out which Halloween candy is really our
favourite?" Wait for responses. After a while the students should be
encouraged to realize that in order for this data to make sense you need to
organize it in some way. Suggest that you make a chart where your data is
recorded.
On a large
piece of grid paper write the title "Our Favourite Halloween Candy",
or the title that best suits your classroom's needs. Close to the bottom of the
paper draw a straight horizontal line and explain that each day during the week
following Halloween each one of them will be required to bring one to two
wrappers of their favourite candy. Using a glue stick or scotch tape they will
tape it on the chart.
Ask:
"How will you know where exactly you should stick your wrappers?"
Establish through discussion that each type of candy should have an appropriate
place on your chart. Point to the first column on the grid and explain that
will be the "Hershey Kisses" column. Therefore, anyone bringing
"Hershey kisses" wrappers will have to stick them on a square in that
column (grid paper is divided into squares). Label the bottom of the first
column "Hershey kisses". Repeat this procedure 5 or 6 times using
different candy label for each column. Label the last column as
"Other" for those items that have not been labeled on your chart.
Explain that placing each candy wrapper in its appropriate place is called
sorting.
End the
lesson by asking: "So if you were to bring in a "Mars" bar
wrapper where would you stick it on the chart?" "What if you brought
in a "Skittles" wrapper?" Give students an opportunity to have
their questions answered. The week following Halloween briefly review what was
discussed during Lesson One. Assist those who need clarification.
Lesson Two
At the end
of the week following Halloween discuss the data collected and presented on the
chart. Explain that the chart is now called the graph of "Our Favourite
Halloween Candy". Point out that "Our Favourite Halloween Candy"
is the title of your graph and that each stack of wrappers on your graph is
called a bar. So your chart is a bar graph of "Our Favourite Halloween
Candy".
To examine
students' understanding ask the following questions:
Which candy is our most favourite Halloween
candy?
Which is our second favourite Halloween
candy?
Which column has the least number of
wrappers?
What does that mean?
Does this mean that __________ are the
favourite Halloween treat in Ms. Smith's class also?
Last week we thought that __________ would
be our favourite Halloween treat. Were we right?
Was the bar graph a good way of organizing
our data?
Evaluation
The
students' responses to your questions and the quality of the discussions will
indicate whether they were able to comprehend the words data, sort and bar
graph and also what is represented by the chart. A checklist may be useful in
evaluating students' understanding of the content taught and classroom
participation.
Notes to
teachers
Before
beginning this lesson you should consider how appropriate this activity will be
for your class. Some of your students, for example, may have food allergies or
other health problems that prevent them from eating candies. Other families may
believe that candy is not appropriate for their child's diet. Others may not be
able to participate in this lesson because of religious restrictions/beliefs.
By Irini
Clelland, Statistics Canada Support Teacher.