In the past, graphic calculators have been sophisticated and exciting tools for higher mathematics, but few would have considered using them more than occasionally with younger students. All this has now changed with the growing range of software Apps now available for Texas Instruments TI-83 Plus calculators. These Apps are more like computer software than calculator programs and, in many ways, make the device more like a laptop than a calculator, especially when combined with the new keyboard, which supports the free "Microsoft Word"-compatible word processor, along with the spreadsheet, dynamic geometry and much more. In this article, the author presents a number of lesson outlines which he has used with upper primary through to secondary students in the past twelve months. The lessons described here explore applications to space, data and number.