Share

## Lesson on Variables

 Lesson on Variables Using a cylindrical "variable machine" to assign numbers from 0 to 25 to the 26 letters of the alphabet, students explore the value of different words, how to maximize and minimize the value of words and how to "set" the machine to get a specific value for a given word, all as a vehicle for helping develop the concept of variable and the linkage of numbers and letters. Reflection Topics & Videos Tasks Discourse Student Learning Teaching Decisions The Mathematics Lesson Plan(PDF) Review the complete lesson plan and accompanying worksheets. Student Work View student work from this lesson. Engaging in the Mathematics 1. The value of Judith's name when the Variable Machine sets the 0 with A is 66. What would be the value of her name if the 0 is set with B? 2. Jack and Judy both have four letter names that begin with J. Why is the value of Judy's name always going to be greater than Jack's for any common setting of the Variable machine? About the Teacher Rosemary Klein, 4th Grade Davidson Elementary School Charlotte-Mecklenberg, NC Angela Baucom, principal

Having trouble running our Java apps? Get help here.

Your feedback is important! Comments or concerns regarding the content of this page may be sent to nctm@nctm.org. Thank you.