# Activities

• • • ##### Subject Area

• Math: Elementary Math: Algebraic Thinking
• Math: Elementary Math: Measurement

• ##### Author 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

Reforestation

#### Activity Overview

Students learn to solve a real-world environmental problem. They learn how to use the parameters of the final product to work out a reforestation plan.

#### Objectives

Students will explore the following concepts in this activity:

• Problem Solving
• Multiplication
• Division
• Decimals
• Fractions
• Measurement
• Money

#### About the Lesson

After a brief introduction, students will then need to read the Reforestation problem.

The Problem: How much will it cost to reforest 10 square miles of forest?

Review the four steps of problem solving with the students:

• Understanding the problem
• Making a plan
• Carrying out the plan
• Evaluating the solution

Students will present their ideas and visual display to the class. Finally, they will practice solving related problems that require multiplying decimals using their TI-15 calculators.