Education Technology

# Activities

• ##### Subject Area

• Math: Elementary Math: Probability, Statistics and Data Analysis

K-5

60 Minutes

• ##### Device
• TI-10
• TI-15 Explorer™
• ##### Other Materials
This is Activity 23 from the EXPLORATIONS Book:
Uncovering Math with Manipulatives, the TI-10, and the TI-15 Explorer

The following materials are required for this activity:
• Small lunch bags
• Two colored tiles
• Pencils and markers

## Tiles in a Bag

#### 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.

• 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