Education Technology

A Tall Story

Published on 06/09/2008

Activity Overview

In this activity, students will use the motion detector to measure their current height and obtain a mean value. They will use this and earlier data to plot a graph of height versus age. Students will identify the mathematical model that reflects the pattern of the data and calculate the rate of growth in humans.

Before the Activity

  • Install the CBL/CBR Application on the students' graphing calculators using TI Connect™, or TI-GRAPH LINK™, TI Connectivity cable and the unit-to-unit link cable
  • Connect the TI-73 Explorer™ to the CBR 2™ unit
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 1 - 9 from the attached PDF file for your class
  • During the Activity

    Distribute the pages to the class.

    Follow the Activity procedures:

  • Use the CBR to record three readings of the student's current height
  • Calculate the mean value
  • Gather measurements of student's height at earlier ages
  • Set up a scatter plot and get a Manual-Fit on the collected data
  • Convert the growth rate from inches per year to centimeters per year, and then to centimeters per month
  • Predict a person's height at various ages
  • Relate growth rate to the slope of the line
  • After the Activity

    Students will fill in the Student Data Collection and Analysis Sheet.

    Review student results:

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