Several of the programs were adapted from the following resources:

Glencoe. *Algebra 1. *New York,
NY: Glencoe/McGraw-Hill, 2001.

Glencoe. *Algebra 2. *New York,
NY: Glencoe/McGraw-Hill, 2001.

Lucas, Christine A. and Jill Baumer-Pina.
*Graphing Calculators in the Mathematics Classroom. *New
York, NY: Glencoe/McGraw-Hill, 1997.

Command information was taken from the following:

Texas Instruments. *TI-83 Graphing
Calculator Guidebook. *Texas Instruments Incorporated, 1996.