i found this<br /><br />[img]http://education.ti.com/images/rightcolumn/products/apps/scitools84_L.gif[/img]http://education.ti.com/educationportal/sites/US/productDetail/us_scitools_83_84.html<br /><br />think they have already come up with a great way to explain significant figure embedded in&nbsp; 	<br />Science Tools App for the TI-83 Plus and TI-84 Plus Families.<br /><br />think forget it, Texas [img]http://education.ti.com/images/webelements/pix.gif[/img] have a great teaching strategy through use of their calculator.<br /><br />in my opinion, this is the best way.&nbsp; Any way i can make one calculator emulator using EJS from&nbsp; open source codes in Javascripts etc ?<br /><br /><br /><br />