Education Technology

# Activities

• ##### Subject Area

• Math: Elementary Math: Number Sense and Estimation
• Math: Elementary Math: Problem Solving

K-5

60 Minutes

• ##### Device
• TI-15 Explorer™
• ##### Other Materials
This activity originally appeared in the EXPLORATIONS Book:
A World of Mathematics: Activities for Grades 4, 5, and 6 Using the TI-15

## Recycled Sounds

#### Activity Overview

Students create a musical instrument from empty 1-liter bottles and use fractional equivalents to tune the bottles.

#### Objectives

Students will explore the following concepts in this activity:

• multiplication
• division
• measurement
• problem solving

#### About the Lesson

To introduce this activity, students will fill one 2-liter bottle half-full with water and blow across the mouth of the bottle to make a sound. They will then take an empty 2-liter bottle and blow across the mouth of the bottle to make a sound. Discuss the two different pitches. Students will then use this experience to solve a new problem.

The Problem: How can an eight-note scale be made with 1-liter bottles?

Review the four problem solving steps with students:

• Understanding the problem
• Making a plan
• Carrying out the plan
• Evaluating the solution
Students will create a chart showing the amount of water in each bottle and how the amounts were calculated. Using their TI-15 calculators, students will discover what happens to a number when you multiply it by a fraction.