Texas Instruments TI15TK Financial Calculator Teacher Kit<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Large keys are grouped and color coded by related functions</li><li>Plastic keys are tamper proof</li><li>ANYLITE solar power - Operates in low light</li><li>Appropriate for math grades K-3</li><li>Negative sign appears to the left of the number displayed</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51q7OS7ZoRL.jpg" noproxy>