Education Technology

Greatest Common Factor

Published on 06/09/2008

Activity Overview

Students use a graphing calculator to find the Greatest Common Factor of two or more numbers.

This Technology Lab accompanies Lesson 4-3 from the ©2007 Holt, Rinehart and Winston Mathematics Course 1 textbook.

Before the Activity

  • Review the lesson PDF files.
  • Make copies of the lesson PDF files for your class.
  • During the Activity

    Students use the gcd(command on the TI-83 Plus or TI-84 Plus graphing calculator to find the greatest common factor of two or more numbers.

    After the Activity

    Review student results:

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