Education Technology

Tiles in a Bag

Published on 06/09/2008

Activity Overview

Students explore probability and patterns in fractions, decimals, and percents by drawing tiles out of a bag.

Before the Activity

  • See the attached PDF file for detailed instructions for this activity
  • Print student activity sheet page 114 from the attached PDf for your class.

  • During the Activity

    Distribute the page to the class.

    Follow the activity procedures:

  • Prepare a "mystery bag" containing ten tiles of two different colors
  • Ask students to guess how many tiles of each of the two colors are in the bag
  • Draw out one tile, record its color, and replace it in the bag
  • After ten such trials, ask students if they wish to change their guesses
  • Record the results as fractions, decimals, and percents
  • Draw 10 more times from the bag, recording the results as fractions, decimals, and percents
  • Have students go through the same process two more times until a total of 40 trials have been made
  • Ask students to make final predictions about the combination of tiles in the bag
  • Analyze the patterns in the fractions, decimals, and percents that they recorded as their results
  • Repeat the activity with a different combination of tiles in two colors
  • After the Activity

  • Review student results
  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary