Handheld computers, sometimes known as PDAs, have been available for purchase since the mid-1990s, as have their handheld relatives, the graphing calculators. It is only in the past few years, however, that these diminutive devices have made their way into K-12 schools in numbers significant enough to allow us to draw conclusions about their…

The implementation of the National Council of Teachers of Mathematics'"Curriculum and Evaluation Standards for School Mathematics" implies fundamental shifts in the teaching and learning of mathematics. Intended for those individuals who will be instrumental in the implementation of those changes--teachers, administrators, and…