Education Technology

Math TODAY - Humidity Makes Air Feel Even Hotter

Published on 10/27/2004

Activity Overview

Students note the range of heat indexes on the overall data as well as specific humidity levels and air temperatures. They find the mean and median of the ranges and calculate apparent temperatures for specific scenarios.

Before the Activity

If you are using the TI-Navigator™ System with the TI-73 Explorer™ you will need the attached .pdf file.
See the attached Teacher Edition PDF file for notes and guidelines for this activity. The Technology Guide PDF file includes step-by-step calculator instructions with screen shots.

If you are using the TI-Navigator™ Classroom Learning System, see the TI-Navigator Basic Skills Guide PDF file for information on how the system can be integrated into your activity.

During the Activity

Students will:

  • Read a chart with dual axes.
  • Calculate the range of data from both a horizontal and vertical perspective.
  • Calculate the mean and median of the ranges on the vertical axis.
  • Calculate heat indexes using a formula and handheld devices.


  • Directions:
  • Distribute the Student Edition PDF file to your class.
  • Follow the activity procedures outlined in the student document.
  • You may use the Transparency PDF file to display a large image of the USA TODAY® graphic during the activity.
  • After the Activity

    Distribute the assessment questions or send the attached LearningCheck™ assessment to your class to gauge student understanding of the concepts presented in the activity.

    If you are using the TI-73 Explorer™, you must use the assessment questions included in the student handout. Users of other calculators can also use the assessment questions in the handout if they do not have access to LearningCheck™.