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 Printable Version
for your convenience!
Mary Ann Polowy
Terri Muensterman
Lesson Plan
Topic: Probability
Grade Level: 1 - 2
Objective: 1 The student will explore probability, practice
addition, develop number sense and use probability terms as they
play a game with color tiles.
Lesson: Time: This activity is designed to take approximately
one class period, 45 ' minutes.
Materials: Small bowls (or paper plates) large enough to
hold 12 color tiles. ( One bowl for each pair of students
Color tiles, 12 per pair of students.
Dice one die per pair of students.
One sheet of chartpaper titled "Rolls to Empty the Bowl'
and listing the numbers 2 - 12 down the left side.
Anticipatory Set: Read a story from the book, Math Fun:
Test Your Luck. Talk about probability and probability words
used in the story. Wnte a list of probability words on the chalkboard
such as, chance, perhaps, likely, unlikely, probably, possible,
perhaps, maybe and could be. Tell the students they get to play
a probability game today and after they play a few times, you'll
look at what's likely or probable to happen. Play an example round
with one of the students to demonstrate the game. Ask the student
to predict the number of rolls it will take to empty the bowl.
Activity:
Post the class chart paper with the heading "Rolls to Empty
the Bowl" in a location
where students can add to it.
Divide the students into pairs. Each pair gets 1 die, 12 color
tiles, a bowl, and a paper and pencil for recording.
To play they will roll the die, note the number that comes up,
and take out that many color tiles. While one person rolls to
see how many times it takes to empty the bowl, the other person
will record each of the other student's rolls on a sheet of paper.
They will continue with one rolling and the other recording until
the bowl is empty. For example, one student rolls a 3, then a 4, then
a 6. The other student writes 3 + 4 + 5 = 12. Rolls to empty the
bowl = 3.
Explain that it is not necessary to go out exactly in this game.
For example, if there are two tiles in the bowl, and a five is
roiled, you may remove the tiles.
Practice:
Have each pair play the game five times. After each game, have
the pair record the
number of rolls it took to empty the bowl on the class chart paper
entitled, "Rolls to
Empty the Bowl."
Closure:
As a class examine the chart to identify the most likely number
of roils it took to empty
the bowl. Also identify the most and fewest rolls it took t'or
anyone to empty the bowl.
Ask them it' they notice anything else.
Discuss the fewest and the greatest number of rolls it could take
to empty the bowl and how likely or unlikely that would be. What
amount of rolls could never empty the bowl? Why? Point to words
on the probability words chart as they are used in discussion.
Extension Play the game using 20 tiles. Have the students
use subtraction skills instead of addition by subtracting the
numbers rolled on the dice trom the 12 tiles.
Sources:
Tank, Bonnie: Math By All Means: Probability Grade i - 2
(A Marilyn Burns Replacement unit, Math solutions Publications,
New York, N.Y., 1996.
Judy McCray, Ridgeway Elementary, Columbia MO
Elting Mary and Wyler, Rose: Math Fun - Test Your Luck
Simon and Schuster, New Yoric, N.Y., 1992.
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