Ana Timbers Stockton
4420 North Beacon
Chicago IL 60640
(773) 535-2450


To observe the relationship between theoretical probability and
experimental results. This activity would work with a seventh grade class.
However, students in grades sixth and eighth grade would enjoy this activity.

Materials Needed:

A. glue, notepad, ruler, pens, scissors, 2 sheets of different-colored
poster board, large sheet of graph paper
B. 6 blue marbles, 4 red marbles, and 2 yellow marbles


Using the coins students will be able to realize probability is useful in our
daily life. Probability helps us understand the world around us and organize
information in ways that make it easier to comprehend.

1. Students will insert 6 blue marbles, 4 red marbles, and 2 yellow marbles
into a small bag.
2. Each student will reach into the bag 40 times and chart how
many times marbles of each color were selected.
3. Using graph paper students will record their findings.
4. Students will compare the relationship between the theoretical probability
and the actual results of our experiment.
5. 6/12 (1/2), 4/12 (1/3), 2/12 (1/6), are the theoretical probabilities of
selecting at random, respectively, each of the three colors.

Performance Assessment:

I will use a grading rubric for this lesson. This rubric contains the Chicago
Public Schools' Curriculum Framework Statements.


Students will be able to identify the phenomenological approach to mathematics.
The theoretical probabilities should be observed in the results of our


Family Math Book

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