Texas Instruments TI-73TP Teachers Guide - Page 14

9 Activity 3 How Do You Measure Up? Students discover the ratio between their heights and the lengths of their intestines. This activity is a good introduction to using lists to find the mean and performing operations on lists. Number Sense ♦ ratios ♦ mean ♦ estimation ♦ measurement Materials ♦ tape measures or rulers for students to measure their heights ♦ ball of string ♦ scissors ♦ masking tape ♦ TI-73  Setup ♦ Ask students: How long do you think your small intestine is? ♦ Have each student estimate the length of their intestine in meters or feet, and then cut a piece of string this length. ♦ Tape a long strip of masking tape on the floor as the horizontal axis, and then make a vertical bar graph using the students' pieces of strings. Activity-Part A Á You may want to do this part of the setup in the hall or some place with a large area of floor space. In this part, students find the average length of their small intestines. Have students perform the steps unless otherwise indicated. © 1998 TEXAS INSTRUMENTS INCORPORATED