Check the listing for details. The Educator Overhead Calculator Blue TI-108 Basic Teacher, School, Projector. Condition: New, Made in China. Listed at 23.50 USD. Stokes Publishing Company The Educator Basic Overhead Calculator is a specialized educational tool designed for use with standard school overhead projectors. This companion to the Texas Instruments TI-108 calculator emulates its layout and functions, featuring a color-coordinated keyboard and an extra-large display for clear visibility in a classroom setting. The set includes a reinforced protective carrying case (Calculator Keeper), a leatherette storage pouch, and instructions for use. Perfect for teachers and educators looking to demonstrate mathematical operations to a full class. Before purchasing, please read the measurments in each photo or the listing details. Thank you for supporting my small business.